315221232 has 20 divisors (see below), whose sum is σ = 814321640. Its totient is φ = 105073728.

The previous prime is 315221219. The next prime is 315221311. The reversal of 315221232 is 232122513.

It is a junction number, because it is equal to n+sod(n) for n = 315221199 and 315221208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3283507 + ... + 3283602.

It is an arithmetic number, because the mean of its divisors is an integer number (40716082).

Almost surely, 2^315221232 is an apocalyptic number.

It is an amenable number.

315221232 is an abundant number, since it is smaller than the sum of its proper divisors (499100408).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

315221232 is a wasteful number, since it uses less digits than its factorization.

315221232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6567120 (or 6567114 counting only the distinct ones).

The product of its digits is 720, while the sum is 21.

The square root of 315221232 is about 17754.4707609098. The cubic root of 315221232 is about 680.5684635155.

Adding to 315221232 its reverse (232122513), we get a palindrome (547343745).

The spelling of 315221232 in words is "three hundred fifteen million, two hundred twenty-one thousand, two hundred thirty-two".