312115135 has 4 divisors (see below), whose sum is σ = 374538168. Its totient is φ = 249692104.

The previous prime is 312115123. The next prime is 312115157. The reversal of 312115135 is 531511213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 531511213 = 31 ⋅17145523.

It is a cyclic number.

It is not a de Polignac number, because 312115135 - 2⁵ = 312115103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31211509 + ... + 31211518.

It is an arithmetic number, because the mean of its divisors is an integer number (93634542).

Almost surely, 2^312115135 is an apocalyptic number.

312115135 is a deficient number, since it is larger than the sum of its proper divisors (62423033).

312115135 is an equidigital number, since it uses as much as digits as its factorization.

312115135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62423032.

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

The square root of 312115135 is about 17666.7805499474. The cubic root of 312115135 is about 678.3257072164.

Adding to 312115135 its reverse (531511213), we get a palindrome (843626348).

The spelling of 312115135 in words is "three hundred twelve million, one hundred fifteen thousand, one hundred thirty-five".