31344220332 has 72 divisors (see below), whose sum is σ = 80926110720. Its totient is φ = 10226694240.

The previous prime is 31344220331. The next prime is 31344220361. The reversal of 31344220332 is 23302244313.

31344220332 is a `hidden beast` number, since 3 + 13 + 442 + 203 + 3 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 31344220296 and 31344220305.

It is not an unprimeable number, because it can be changed into a prime (31344220331) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 311173 + ... + 399395.

It is an arithmetic number, because the mean of its divisors is an integer number (1123973760).

Almost surely, 2^31344220332 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31344220332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40463055360).

31344220332 is an abundant number, since it is smaller than the sum of its proper divisors (49581890388).

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

31344220332 is a wasteful number, since it uses less digits than its factorization.

31344220332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88443 (or 88438 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 27.

Adding to 31344220332 its reverse (23302244313), we get a palindrome (54646464645).

The spelling of 31344220332 in words is "thirty-one billion, three hundred forty-four million, two hundred twenty thousand, three hundred thirty-two".