312303400531 has 2 divisors, whose sum is σ = 312303400532. Its totient is φ = 312303400530.

The previous prime is 312303400529. The next prime is 312303400547. The reversal of 312303400531 is 135004303213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 312303400531 - 2¹ = 312303400529 is a prime.

It is a super-2 number, since 2×312303400531² (a number of 24 digits) contains 22 as substring.

Together with 312303400529, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 312303400496 and 312303400505.

It is not a weakly prime, because it can be changed into another prime (312303400511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156151700265 + 156151700266.

It is an arithmetic number, because the mean of its divisors is an integer number (156151700266).

Almost surely, 2^312303400531 is an apocalyptic number.

312303400531 is a deficient number, since it is larger than the sum of its proper divisors (1).

312303400531 is an equidigital number, since it uses as much as digits as its factorization.

312303400531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 25.

Adding to 312303400531 its reverse (135004303213), we get a palindrome (447307703744).

The spelling of 312303400531 in words is "three hundred twelve billion, three hundred three million, four hundred thousand, five hundred thirty-one".