315222123 has 4 divisors (see below), whose sum is σ = 420296168. Its totient is φ = 210148080.

The previous prime is 315222113. The next prime is 315222137. The reversal of 315222123 is 321222513.

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

It is not a de Polignac number, because 315222123 - 2¹² = 315218027 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 315222123.

It is not an unprimeable number, because it can be changed into a prime (315222113) 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, 52537018 + ... + 52537023.

It is an arithmetic number, because the mean of its divisors is an integer number (105074042).

Almost surely, 2^315222123 is an apocalyptic number.

315222123 is a deficient number, since it is larger than the sum of its proper divisors (105074045).

315222123 is a wasteful number, since it uses less digits than its factorization.

315222123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105074044.

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

The square root of 315222123 is about 17754.4958531635. The cubic root of 315222123 is about 680.5691047434.

Adding to 315222123 its reverse (321222513), we get a palindrome (636444636).

The spelling of 315222123 in words is "three hundred fifteen million, two hundred twenty-two thousand, one hundred twenty-three".