312131100323402 has 4 divisors (see below), whose sum is σ = 468196650485106. Its totient is φ = 156065550161700.

The previous prime is 312131100323389. The next prime is 312131100323411. The reversal of 312131100323402 is 204323001131213.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 226351994910001 + 85779105413401 = 15044999^2 + 9261701^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78032775080849 + ... + 78032775080852.

Almost surely, 2^{312131100323402} is an apocalyptic number.

312131100323402 is a deficient number, since it is larger than the sum of its proper divisors (156065550161704).

312131100323402 is a wasteful number, since it uses less digits than its factorization.

312131100323402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156065550161703.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 312131100323402 its reverse (204323001131213), we get a palindrome (516454101454615).

The spelling of 312131100323402 in words is "three hundred twelve trillion, one hundred thirty-one billion, one hundred million, three hundred twenty-three thousand, four hundred two".