311996972125 has 16 divisors (see below), whose sum is σ = 394706098800. Its totient is φ = 246178425600.

The previous prime is 311996972123. The next prime is 311996972201. The reversal of 311996972125 is 521279699113.

It can be written as a sum of positive squares in 8 ways, for example, as 16083819684 + 295913152441 = 126822^2 + 543979^2 .

It is not a de Polignac number, because 311996972125 - 2¹ = 311996972123 is a prime.

It is a super-2 number, since 2×311996972125² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311996972123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17086600 + ... + 17104849.

It is an arithmetic number, because the mean of its divisors is an integer number (24669131175).

Almost surely, 2^311996972125 is an apocalyptic number.

It is an amenable number.

311996972125 is a deficient number, since it is larger than the sum of its proper divisors (82709126675).

311996972125 is an equidigital number, since it uses as much as digits as its factorization.

311996972125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34191537 (or 34191527 counting only the distinct ones).

The product of its digits is 1837080, while the sum is 55.

The spelling of 311996972125 in words is "three hundred eleven billion, nine hundred ninety-six million, nine hundred seventy-two thousand, one hundred twenty-five".