315631551 has 4 divisors (see below), whose sum is σ = 420842072. Its totient is φ = 210421032.

The previous prime is 315631549. The next prime is 315631577. The reversal of 315631551 is 155136513.

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

It is not a de Polignac number, because 315631551 - 2¹ = 315631549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315631541) 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, 52605256 + ... + 52605261.

It is an arithmetic number, because the mean of its divisors is an integer number (105210518).

Almost surely, 2^315631551 is an apocalyptic number.

315631551 is a deficient number, since it is larger than the sum of its proper divisors (105210521).

315631551 is a wasteful number, since it uses less digits than its factorization.

315631551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105210520.

The product of its digits is 6750, while the sum is 30.

The square root of 315631551 is about 17766.0223741838. The cubic root of 315631551 is about 680.8636309147.

The spelling of 315631551 in words is "three hundred fifteen million, six hundred thirty-one thousand, five hundred fifty-one".