312440221432 has 16 divisors (see below), whose sum is σ = 585832496760. Its totient is φ = 156218222304.

The previous prime is 312440221421. The next prime is 312440221463. The reversal of 312440221432 is 234122044213.

It is a self number, because there is not a number n which added to its sum of digits gives 312440221432.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 673083 + ... + 1038229.

Almost surely, 2^312440221432 is an apocalyptic number.

It is an amenable number.

312440221432 is a deficient number, since it is larger than the sum of its proper divisors (273392275328).

312440221432 is a wasteful number, since it uses less digits than its factorization.

312440221432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472110 (or 472106 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 312440221432 its reverse (234122044213), we get a palindrome (546562265645).

The spelling of 312440221432 in words is "three hundred twelve billion, four hundred forty million, two hundred twenty-one thousand, four hundred thirty-two".