312513031 has 2 divisors, whose sum is σ = 312513032. Its totient is φ = 312513030.

The previous prime is 312513017. The next prime is 312513041. The reversal of 312513031 is 130315213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 312513031 - 2¹³ = 312504839 is a prime.

It is a super-2 number, since 2×312513031² = 195328789089613922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312513041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156256515 + 156256516.

It is an arithmetic number, because the mean of its divisors is an integer number (156256516).

Almost surely, 2^312513031 is an apocalyptic number.

312513031 is a deficient number, since it is larger than the sum of its proper divisors (1).

312513031 is an equidigital number, since it uses as much as digits as its factorization.

312513031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 270, while the sum is 19.

The square root of 312513031 is about 17678.0380981601. The cubic root of 312513031 is about 678.6138364379.

Adding to 312513031 its reverse (130315213), we get a palindrome (442828244).

The spelling of 312513031 in words is "three hundred twelve million, five hundred thirteen thousand, thirty-one".