313213819 has 2 divisors, whose sum is σ = 313213820. Its totient is φ = 313213818.

The previous prime is 313213807. The next prime is 313213829. The reversal of 313213819 is 918312313.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 313213819 - 2⁵ = 313213787 is a prime.

It is a super-2 number, since 2×313213819² = 196205792825129522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (313213829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156606909 + 156606910.

It is an arithmetic number, because the mean of its divisors is an integer number (156606910).

Almost surely, 2^313213819 is an apocalyptic number.

313213819 is a deficient number, since it is larger than the sum of its proper divisors (1).

313213819 is an equidigital number, since it uses as much as digits as its factorization.

313213819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 31.

The square root of 313213819 is about 17697.8478635115. The cubic root of 313213819 is about 679.1207053311.

The spelling of 313213819 in words is "three hundred thirteen million, two hundred thirteen thousand, eight hundred nineteen".