315123155 has 8 divisors (see below), whose sum is σ = 380413152. Its totient is φ = 250588288.

The previous prime is 315123121. The next prime is 315123163. The reversal of 315123155 is 551321513.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 315123155 - 2¹⁰ = 315122131 is a prime.

It is a Duffinian 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, 187862 + ... + 189531.

It is an arithmetic number, because the mean of its divisors is an integer number (47551644).

Almost surely, 2^315123155 is an apocalyptic number.

315123155 is a deficient number, since it is larger than the sum of its proper divisors (65289997).

315123155 is a wasteful number, since it uses less digits than its factorization.

315123155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377565.

The product of its digits is 2250, while the sum is 26.

The square root of 315123155 is about 17751.7085093238. The cubic root of 315123155 is about 680.4978728422.

Adding to 315123155 its reverse (551321513), we get a palindrome (866444668).

The spelling of 315123155 in words is "three hundred fifteen million, one hundred twenty-three thousand, one hundred fifty-five".