315491 has 16 divisors (see below), whose sum is σ = 380160. Its totient is φ = 258720.

The previous prime is 315481. The next prime is 315493. The reversal of 315491 is 194513.

315491 = T₉₉ + T₁₀₀ + ... + T₁₄₁.

It is a happy number.

It is not a de Polignac number, because 315491 - 2¹⁰ = 314467 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (315493) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7316 + ... + 7358.

It is an arithmetic number, because the mean of its divisors is an integer number (23760).

2³¹⁵⁴⁹¹ is an apocalyptic number.

315491 is a deficient number, since it is larger than the sum of its proper divisors (64669).

315491 is a wasteful number, since it uses less digits than its factorization.

315491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106.

The product of its digits is 540, while the sum is 23.

The square root of 315491 is about 561.6858552607. The cubic root of 315491 is about 68.0762552857.

The spelling of 315491 in words is "three hundred fifteen thousand, four hundred ninety-one".