312012431 has 16 divisors (see below), whose sum is σ = 324251424. Its totient is φ = 300079104.

The previous prime is 312012413. The next prime is 312012469. The reversal of 312012431 is 134210213.

It is a cyclic number.

It is not a de Polignac number, because 312012431 - 2²⁶ = 244903567 is a prime.

It is a super-2 number, since 2×312012431² = 194703514197059522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312018431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 704096 + ... + 704538.

It is an arithmetic number, because the mean of its divisors is an integer number (20265714).

Almost surely, 2^312012431 is an apocalyptic number.

312012431 is a deficient number, since it is larger than the sum of its proper divisors (12238993).

312012431 is a wasteful number, since it uses less digits than its factorization.

312012431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 312012431 is about 17663.8736125460. The cubic root of 312012431 is about 678.2512962074.

Adding to 312012431 its reverse (134210213), we get a palindrome (446222644).

It can be divided in two parts, 3120 and 12431, that added together give a palindrome (15551).

The spelling of 312012431 in words is "three hundred twelve million, twelve thousand, four hundred thirty-one".