312123255402 has 32 divisors (see below), whose sum is σ = 750973248000. Its totient is φ = 84484489968.

The previous prime is 312123255397. The next prime is 312123255403. The reversal of 312123255402 is 204552321213.

It is a self number, because there is not a number n which added to its sum of digits gives 312123255402.

It is not an unprimeable number, because it can be changed into a prime (312123255403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 195565152 + ... + 195566747.

It is an arithmetic number, because the mean of its divisors is an integer number (23467914000).

Almost surely, 2^312123255402 is an apocalyptic number.

312123255402 is an abundant number, since it is smaller than the sum of its proper divisors (438849992598).

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

312123255402 is a wasteful number, since it uses less digits than its factorization.

312123255402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391131930.

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 312123255402 its reverse (204552321213), we get a palindrome (516675576615).

The spelling of 312123255402 in words is "three hundred twelve billion, one hundred twenty-three million, two hundred fifty-five thousand, four hundred two".