315231055 has 4 divisors (see below), whose sum is σ = 378277272. Its totient is φ = 252184840.

The previous prime is 315231053. The next prime is 315231061. The reversal of 315231055 is 550132513.

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

It is not a de Polignac number, because 315231055 - 2¹ = 315231053 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 (315231053) 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, 31523101 + ... + 31523110.

It is an arithmetic number, because the mean of its divisors is an integer number (94569318).

Almost surely, 2^315231055 is an apocalyptic number.

315231055 is a deficient number, since it is larger than the sum of its proper divisors (63046217).

315231055 is an equidigital number, since it uses as much as digits as its factorization.

315231055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63046216.

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 315231055 is about 17754.7473933030. The cubic root of 315231055 is about 680.5755327883.

Adding to 315231055 its reverse (550132513), we get a palindrome (865363568).

The spelling of 315231055 in words is "three hundred fifteen million, two hundred thirty-one thousand, fifty-five".