312101431 has 2 divisors, whose sum is σ = 312101432. Its totient is φ = 312101430.

The previous prime is 312101423. The next prime is 312101441. The reversal of 312101431 is 134101213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 312101431 - 2³ = 312101423 is a prime.

It is a super-2 number, since 2×312101431² = 194814606464495522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312101441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156050715 + 156050716.

It is an arithmetic number, because the mean of its divisors is an integer number (156050716).

Almost surely, 2^312101431 is an apocalyptic number.

312101431 is a deficient number, since it is larger than the sum of its proper divisors (1).

312101431 is an equidigital number, since it uses as much as digits as its factorization.

312101431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 312101431 is about 17666.3926991336. The cubic root of 312101431 is about 678.3157793506.

Adding to 312101431 its reverse (134101213), we get a palindrome (446202644).

The spelling of 312101431 in words is "three hundred twelve million, one hundred one thousand, four hundred thirty-one".