313221554244 has 81 divisors (see below), whose sum is σ = 814054508631. Its totient is φ = 101545073280.

The previous prime is 313221554231. The next prime is 313221554249. The reversal of 313221554244 is 442455122313.

It is a happy number.

The square root of 313221554244 is 559662.

It is a perfect power (a square), and thus also a powerful number.

313221554244 is a `hidden beast` number, since 3 + 1 + 3 + 221 + 5 + 5 + 424 + 4 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 27732240900 + 285489313344 = 166530^2 + 534312^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 313221554199 and 313221554208.

It is not an unprimeable number, because it can be changed into a prime (313221554249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 124243704 + ... + 124246224.

Almost surely, 2^313221554244 is an apocalyptic number.

313221554244 is the 559662-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 313221554244

313221554244 is an abundant number, since it is smaller than the sum of its proper divisors (500832954387).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

313221554244 is an equidigital number, since it uses as much as digits as its factorization.

313221554244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5126 (or 2563 counting only the distinct ones).

The product of its digits is 115200, while the sum is 36.

Multiplying 313221554244 by its sum of digits (36), we get a square (11275975952784 = 3357972²).

313221554244 divided by its sum of digits (36) gives a square (8700598729 = 93277²).

Adding to 313221554244 its reverse (442455122313), we get a palindrome (755676676557).

The spelling of 313221554244 in words is "three hundred thirteen billion, two hundred twenty-one million, five hundred fifty-four thousand, two hundred forty-four".