305520143112 has 128 divisors (see below), whose sum is σ = 869865955200. Its totient is φ = 99326304000.

The previous prime is 305520143111. The next prime is 305520143141. The reversal of 305520143112 is 211341025503.

305520143112 is a `hidden beast` number, since 305 + 5 + 201 + 43 + 112 = 666.

It is a super-2 number, since 2×305520143112² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (305520143111) 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 31 ways as a sum of consecutive naturals, for example, 1357162 + ... + 1566182.

It is an arithmetic number, because the mean of its divisors is an integer number (6795827775).

Almost surely, 2^305520143112 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 305520143112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (434932977600).

305520143112 is an abundant number, since it is smaller than the sum of its proper divisors (564345812088).

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

305520143112 is a wasteful number, since it uses less digits than its factorization.

305520143112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209204 (or 209194 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 305520143112 its reverse (211341025503), we get a palindrome (516861168615).

The spelling of 305520143112 in words is "three hundred five billion, five hundred twenty million, one hundred forty-three thousand, one hundred twelve".