312131100000402 has 32 divisors (see below), whose sum is σ = 703394028178560. Its totient is φ = 102578295773520.

The previous prime is 312131100000389. The next prime is 312131100000409. The reversal of 312131100000402 is 204000001131213.

312131100000402 is a `hidden beast` number, since 31 + 2 + 131 + 100 + 0 + 0 + 0 + 402 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (312131100000409) 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, 40705669093 + ... + 40705676760.

It is an arithmetic number, because the mean of its divisors is an integer number (21981063380580).

Almost surely, 2^{312131100000402} is an apocalyptic number.

312131100000402 is an abundant number, since it is smaller than the sum of its proper divisors (391262928178158).

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

312131100000402 is a wasteful number, since it uses less digits than its factorization.

312131100000402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81411345935 (or 81411345929 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 312131100000402 its reverse (204000001131213), we get a palindrome (516131101131615).

The spelling of 312131100000402 in words is "three hundred twelve trillion, one hundred thirty-one billion, one hundred million, four hundred two", and thus it is an aban number.