305312120512 has 28 divisors (see below), whose sum is σ = 692404274320. Its totient is φ = 130848051456.

The previous prime is 305312120497. The next prime is 305312120543. The reversal of 305312120512 is 215021213503.

It is a tau number, because it is divible by the number of its divisors (28).

It is a super-2 number, since 2×305312120512² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 340749687 + ... + 340750582.

Almost surely, 2^305312120512 is an apocalyptic number.

305312120512 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

305312120512 is an abundant number, since it is smaller than the sum of its proper divisors (387092153808).

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

305312120512 is an equidigital number, since it uses as much as digits as its factorization.

305312120512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681500288 (or 681500278 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The spelling of 305312120512 in words is "three hundred five billion, three hundred twelve million, one hundred twenty thousand, five hundred twelve".