315155491 has 4 divisors (see below), whose sum is σ = 360177712. Its totient is φ = 270133272.

The previous prime is 315155483. The next prime is 315155501. The reversal of 315155491 is 194551513.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 315155491 - 2³ = 315155483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (315155791) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22511100 + ... + 22511113.

It is an arithmetic number, because the mean of its divisors is an integer number (90044428).

Almost surely, 2^315155491 is an apocalyptic number.

315155491 is a deficient number, since it is larger than the sum of its proper divisors (45022221).

315155491 is an equidigital number, since it uses as much as digits as its factorization.

315155491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45022220.

The product of its digits is 13500, while the sum is 34.

The square root of 315155491 is about 17752.6192715329. The cubic root of 315155491 is about 680.5211482149.

The spelling of 315155491 in words is "three hundred fifteen million, one hundred fifty-five thousand, four hundred ninety-one".