311325115520 has 32 divisors (see below), whose sum is σ = 744261605820. Its totient is φ = 124530045952.

The previous prime is 311325115489. The next prime is 311325115523. The reversal of 311325115520 is 25511523113.

It can be written as a sum of positive squares in 2 ways, for example, as 291453138496 + 19871977024 = 539864^2 + 140968^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (311325115523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243222107 + ... + 243223386.

Almost surely, 2^311325115520 is an apocalyptic number.

It is an amenable number.

311325115520 is an abundant number, since it is smaller than the sum of its proper divisors (432936490300).

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

311325115520 is an equidigital number, since it uses as much as digits as its factorization.

311325115520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486445512 (or 486445500 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 29.

Adding to 311325115520 its reverse (25511523113), we get a palindrome (336836638633).

The spelling of 311325115520 in words is "three hundred eleven billion, three hundred twenty-five million, one hundred fifteen thousand, five hundred twenty".