315089381 has 2 divisors, whose sum is σ = 315089382. Its totient is φ = 315089380.

The previous prime is 315089377. The next prime is 315089429. The reversal of 315089381 is 183980513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 212168356 + 102921025 = 14566^2 + 10145^2 .

It is a cyclic number.

It is not a de Polignac number, because 315089381 - 2² = 315089377 is a prime.

It is a super-2 number, since 2×315089381² = 198562636037926322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315089371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157544690 + 157544691.

It is an arithmetic number, because the mean of its divisors is an integer number (157544691).

Almost surely, 2^315089381 is an apocalyptic number.

It is an amenable number.

315089381 is a deficient number, since it is larger than the sum of its proper divisors (1).

315089381 is an equidigital number, since it uses as much as digits as its factorization.

315089381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 315089381 is about 17750.7571951171. The cubic root of 315089381 is about 680.4735607006.

The spelling of 315089381 in words is "three hundred fifteen million, eighty-nine thousand, three hundred eighty-one".