315123222 has 16 divisors (see below), whose sum is σ = 651979440. Its totient is φ = 101418912.

The previous prime is 315123199. The next prime is 315123241. The reversal of 315123222 is 222321513.

It is a super-2 number, since 2×315123222² = 198605290087322568, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 905353 + ... + 905700.

It is an arithmetic number, because the mean of its divisors is an integer number (40748715).

Almost surely, 2^315123222 is an apocalyptic number.

315123222 is an abundant number, since it is smaller than the sum of its proper divisors (336856218).

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

315123222 is a wasteful number, since it uses less digits than its factorization.

315123222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1811087.

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

The square root of 315123222 is about 17751.7103964660. The cubic root of 315123222 is about 680.4979210703.

Adding to 315123222 its reverse (222321513), we get a palindrome (537444735).

The spelling of 315123222 in words is "three hundred fifteen million, one hundred twenty-three thousand, two hundred twenty-two".