313051381 has 2 divisors, whose sum is σ = 313051382. Its totient is φ = 313051380.

The previous prime is 313051373. The next prime is 313051393. The reversal of 313051381 is 183150313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 218300625 + 94750756 = 14775^2 + 9734^2 .

It is an emirp because it is prime and its reverse (183150313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 313051381 - 2³ = 313051373 is a prime.

It is a super-2 number, since 2×313051381² = 196002334292014322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313058381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156525690 + 156525691.

It is an arithmetic number, because the mean of its divisors is an integer number (156525691).

Almost surely, 2^313051381 is an apocalyptic number.

It is an amenable number.

313051381 is a deficient number, since it is larger than the sum of its proper divisors (1).

313051381 is an equidigital number, since it uses as much as digits as its factorization.

313051381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 313051381 is about 17693.2580662805. The cubic root of 313051381 is about 679.0032838569.

The spelling of 313051381 in words is "three hundred thirteen million, fifty-one thousand, three hundred eighty-one".