312404431 has 6 divisors (see below), whose sum is σ = 321077400. Its totient is φ = 303959736.

The previous prime is 312404401. The next prime is 312404471. The reversal of 312404431 is 134404213.

It is not a de Polignac number, because 312404431 - 2¹³ = 312396239 is a prime.

It is a super-2 number, since 2×312404431² = 195193057016867522, 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 (312404401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 112731 + ... + 115468.

It is an arithmetic number, because the mean of its divisors is an integer number (53512900).

Almost surely, 2^312404431 is an apocalyptic number.

312404431 is a deficient number, since it is larger than the sum of its proper divisors (8672969).

312404431 is an equidigital number, since it uses as much as digits as its factorization.

312404431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228273 (or 228236 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 312404431 is about 17674.9662234472. The cubic root of 312404431 is about 678.5352199817.

Adding to 312404431 its reverse (134404213), we get a palindrome (446808644).

The spelling of 312404431 in words is "three hundred twelve million, four hundred four thousand, four hundred thirty-one".