315115123 has 4 divisors (see below), whose sum is σ = 316228888. Its totient is φ = 314001360.

The previous prime is 315115117. The next prime is 315115127. The reversal of 315115123 is 321511513.

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

It is a cyclic number.

It is not a de Polignac number, because 315115123 - 2¹³ = 315106931 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 315115094 and 315115103.

It is not an unprimeable number, because it can be changed into a prime (315115127) 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 3 ways as a sum of consecutive naturals, for example, 556458 + ... + 557023.

It is an arithmetic number, because the mean of its divisors is an integer number (79057222).

Almost surely, 2^315115123 is an apocalyptic number.

315115123 is a deficient number, since it is larger than the sum of its proper divisors (1113765).

315115123 is a wasteful number, since it uses less digits than its factorization.

315115123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1113764.

The product of its digits is 450, while the sum is 22.

The square root of 315115123 is about 17751.4822761368. The cubic root of 315115123 is about 680.4920911817.

Adding to 315115123 its reverse (321511513), we get a palindrome (636626636).

The spelling of 315115123 in words is "three hundred fifteen million, one hundred fifteen thousand, one hundred twenty-three".