315123500 has 24 divisors (see below), whose sum is σ = 688230816. Its totient is φ = 126049200.

The previous prime is 315123491. The next prime is 315123511. The reversal of 315123500 is 5321513.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

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, 314624 + ... + 315623.

It is an arithmetic number, because the mean of its divisors is an integer number (28676284).

Almost surely, 2^315123500 is an apocalyptic number.

It is an amenable number.

315123500 is an abundant number, since it is smaller than the sum of its proper divisors (373107316).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

315123500 is a wasteful number, since it uses less digits than its factorization.

315123500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630266 (or 630254 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 315123500 is about 17751.7182266957. The cubic root of 315123500 is about 680.4981211808.

The spelling of 315123500 in words is "three hundred fifteen million, one hundred twenty-three thousand, five hundred".