315500 has 24 divisors (see below), whose sum is σ = 690144. Its totient is φ = 126000.

The previous prime is 315493. The next prime is 315517. The reversal of 315500 is 5513.

315500 = T₁₅₀ + T₁₅₁ + ... + T₁₇₃.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185 + ... + 815.

It is an arithmetic number, because the mean of its divisors is an integer number (28756).

2³¹⁵⁵⁰⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 315500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (345072).

315500 is an abundant number, since it is smaller than the sum of its proper divisors (374644).

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

315500 is a wasteful number, since it uses less digits than its factorization.

315500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650 (or 638 counting only the distinct ones).

The product of its (nonzero) digits is 75, while the sum is 14.

The square root of 315500 is about 561.6938667993. The cubic root of 315500 is about 68.0769026158.

The spelling of 315500 in words is "three hundred fifteen thousand, five hundred".