312440403231 has 48 divisors (see below), whose sum is σ = 519028548480. Its totient is φ = 179119512000.

The previous prime is 312440403157. The next prime is 312440403271. The reversal of 312440403231 is 132304044213.

312440403231 is a `hidden beast` number, since 3 + 1 + 24 + 4 + 0 + 403 + 231 = 666.

It is not a de Polignac number, because 312440403231 - 2¹⁷ = 312440272159 is a prime.

It is a super-2 number, since 2×312440403231² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 312440403195 and 312440403204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312440403271) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1117696 + ... + 1368986.

It is an arithmetic number, because the mean of its divisors is an integer number (10813094760).

Almost surely, 2^312440403231 is an apocalyptic number.

312440403231 is a deficient number, since it is larger than the sum of its proper divisors (206588145249).

312440403231 is a wasteful number, since it uses less digits than its factorization.

312440403231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251988 (or 251985 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 312440403231 its reverse (132304044213), we get a palindrome (444744447444).

The spelling of 312440403231 in words is "three hundred twelve billion, four hundred forty million, four hundred three thousand, two hundred thirty-one".