312131340213402 has 16 divisors (see below), whose sum is σ = 637544865117312. Its totient is φ = 101830082622720.

The previous prime is 312131340213389. The next prime is 312131340213419. The reversal of 312131340213402 is 204312043131213.

It is a self number, because there is not a number n which added to its sum of digits gives 312131340213402.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 553424361799 + ... + 553424362362.

It is an arithmetic number, because the mean of its divisors is an integer number (39846554069832).

Almost surely, 2^{312131340213402} is an apocalyptic number.

312131340213402 is an abundant number, since it is smaller than the sum of its proper divisors (325413524903910).

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

312131340213402 is a wasteful number, since it uses less digits than its factorization.

312131340213402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1106848724213.

The product of its (nonzero) digits is 10368, while the sum is 30.

Adding to 312131340213402 its reverse (204312043131213), we get a palindrome (516443383344615).

The spelling of 312131340213402 in words is "three hundred twelve trillion, one hundred thirty-one billion, three hundred forty million, two hundred thirteen thousand, four hundred two".