313240831 has 2 divisors, whose sum is σ = 313240832. Its totient is φ = 313240830.

The previous prime is 313240817. The next prime is 313240843. The reversal of 313240831 is 138042313.

It is a strong prime.

It is an emirp because it is prime and its reverse (138042313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 313240831 - 2⁵ = 313240799 is a prime.

It is a super-2 number, since 2×313240831² = 196239636411141122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 313240796 and 313240805.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313240891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156620415 + 156620416.

It is an arithmetic number, because the mean of its divisors is an integer number (156620416).

Almost surely, 2^313240831 is an apocalyptic number.

313240831 is a deficient number, since it is larger than the sum of its proper divisors (1).

313240831 is an equidigital number, since it uses as much as digits as its factorization.

313240831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 313240831 is about 17698.6109906964. The cubic root of 313240831 is about 679.1402275446.

The spelling of 313240831 in words is "three hundred thirteen million, two hundred forty thousand, eight hundred thirty-one".