312043431 has 16 divisors (see below), whose sum is σ = 476285184. Its totient is φ = 178014144.

The previous prime is 312043423. The next prime is 312043453. The reversal of 312043431 is 134340213.

It is not a de Polignac number, because 312043431 - 2³ = 312043423 is a prime.

It is a super-2 number, since 2×312043431² = 194742205660503522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 312043398 and 312043407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312043411) 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, 916 + ... + 24998.

It is an arithmetic number, because the mean of its divisors is an integer number (29767824).

Almost surely, 2^312043431 is an apocalyptic number.

312043431 is a deficient number, since it is larger than the sum of its proper divisors (164241753).

312043431 is a wasteful number, since it uses less digits than its factorization.

312043431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24710.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 312043431 is about 17664.7510879718. The cubic root of 312043431 is about 678.2737580196.

Adding to 312043431 its reverse (134340213), we get a palindrome (446383644).

The spelling of 312043431 in words is "three hundred twelve million, forty-three thousand, four hundred thirty-one".