315120155 has 16 divisors (see below), whose sum is σ = 433772544. Its totient is φ = 215278560.

The previous prime is 315120133. The next prime is 315120161. The reversal of 315120155 is 551021513.

It is a happy number.

It is not a de Polignac number, because 315120155 - 2²⁰ = 314071579 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 315120155.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 7127 + ... + 26096.

It is an arithmetic number, because the mean of its divisors is an integer number (27110784).

Almost surely, 2^315120155 is an apocalyptic number.

315120155 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

315120155 is a deficient number, since it is larger than the sum of its proper divisors (118652389).

315120155 is a wasteful number, since it uses less digits than its factorization.

315120155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33506.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 315120155 is about 17751.6240102138. The cubic root of 315120155 is about 680.4957133690.

Adding to 315120155 its reverse (551021513), we get a palindrome (866141668).

The spelling of 315120155 in words is "three hundred fifteen million, one hundred twenty thousand, one hundred fifty-five".