312531503 has 2 divisors, whose sum is σ = 312531504. Its totient is φ = 312531502.

The previous prime is 312531481. The next prime is 312531509. The reversal of 312531503 is 305135213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 312531503 - 2²⁸ = 44096047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312531509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156265751 + 156265752.

It is an arithmetic number, because the mean of its divisors is an integer number (156265752).

Almost surely, 2^312531503 is an apocalyptic number.

312531503 is a deficient number, since it is larger than the sum of its proper divisors (1).

312531503 is an equidigital number, since it uses as much as digits as its factorization.

312531503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1350, while the sum is 23.

The square root of 312531503 is about 17678.5605466056. The cubic root of 312531503 is about 678.6272066620.

Adding to 312531503 its reverse (305135213), we get a palindrome (617666716).

The spelling of 312531503 in words is "three hundred twelve million, five hundred thirty-one thousand, five hundred three".