315055681 has 8 divisors (see below), whose sum is σ = 327349800. Its totient is φ = 302856960.

The previous prime is 315055669. The next prime is 315055721. The reversal of 315055681 is 186550513.

It can be written as a sum of positive squares in 4 ways, for example, as 102333456 + 212722225 = 10116^2 + 14585^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 315055681 - 2⁵ = 315055649 is a prime.

It is a super-2 number, since 2×315055681² = 198520164260747522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (315055621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17080 + ... + 30361.

It is an arithmetic number, because the mean of its divisors is an integer number (40918725).

Almost surely, 2^315055681 is an apocalyptic number.

It is an amenable number.

315055681 is a deficient number, since it is larger than the sum of its proper divisors (12294119).

315055681 is a wasteful number, since it uses less digits than its factorization.

315055681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47699.

The product of its (nonzero) digits is 18000, while the sum is 34.

The square root of 315055681 is about 17749.8079144536. The cubic root of 315055681 is about 680.4493000961.

The spelling of 315055681 in words is "three hundred fifteen million, fifty-five thousand, six hundred eighty-one".