315125881 has 8 divisors (see below), whose sum is σ = 371761664. Its totient is φ = 261394560.

The previous prime is 315125873. The next prime is 315125891. The reversal of 315125881 is 188521513.

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

It is not a de Polignac number, because 315125881 - 2³ = 315125873 is a prime.

It is a super-2 number, since 2×315125881² = 198608641752052322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (315125831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 725880 + ... + 726313.

It is an arithmetic number, because the mean of its divisors is an integer number (46470208).

Almost surely, 2^315125881 is an apocalyptic number.

315125881 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

315125881 is a deficient number, since it is larger than the sum of its proper divisors (56635783).

315125881 is a wasteful number, since it uses less digits than its factorization.

315125881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1452231.

The product of its digits is 9600, while the sum is 34.

The square root of 315125881 is about 17751.7852904997. The cubic root of 315125881 is about 680.4998350717.

The spelling of 315125881 in words is "three hundred fifteen million, one hundred twenty-five thousand, eight hundred eighty-one".