315125321 has 12 divisors (see below), whose sum is σ = 372049488. Its totient is φ = 266073192.

The previous prime is 315125269. The next prime is 315125357. The reversal of 315125321 is 123521513.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-315125321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (315125381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44711 + ... + 51276.

It is an arithmetic number, because the mean of its divisors is an integer number (31004124).

Almost surely, 2^315125321 is an apocalyptic number.

It is an amenable number.

315125321 is a deficient number, since it is larger than the sum of its proper divisors (56924167).

315125321 is an equidigital number, since it uses as much as digits as its factorization.

315125321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96068 (or 96061 counting only the distinct ones).

The product of its digits is 900, while the sum is 23.

The square root of 315125321 is about 17751.7695174312. The cubic root of 315125321 is about 680.4994319734.

Adding to 315125321 its reverse (123521513), we get a palindrome (438646834).

The spelling of 315125321 in words is "three hundred fifteen million, one hundred twenty-five thousand, three hundred twenty-one".