312131402210440 has 64 divisors (see below), whose sum is σ = 726569973043200. Its totient is φ = 120537804801792.

The previous prime is 312131402210413. The next prime is 312131402210489. The reversal of 312131402210440 is 44012204131213.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 312131402210399 and 312131402210408.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4144329 + ... + 25326631.

It is an arithmetic number, because the mean of its divisors is an integer number (11352655828800).

Almost surely, 2^{312131402210440} is an apocalyptic number.

It is an amenable number.

312131402210440 is an abundant number, since it is smaller than the sum of its proper divisors (414438570832760).

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

312131402210440 is a wasteful number, since it uses less digits than its factorization.

312131402210440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21195046 (or 21195042 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 312131402210440 its reverse (44012204131213), we get a palindrome (356143606341653).

The spelling of 312131402210440 in words is "three hundred twelve trillion, one hundred thirty-one billion, four hundred two million, two hundred ten thousand, four hundred forty".