313115551 has 16 divisors (see below), whose sum is σ = 373976064. Its totient is φ = 256554144.

The previous prime is 313115533. The next prime is 313115587. The reversal of 313115551 is 155511313.

It is a happy number.

It is not a de Polignac number, because 313115551 - 2⁵ = 313115519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313115521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3081 + ... + 25213.

It is an arithmetic number, because the mean of its divisors is an integer number (23373504).

Almost surely, 2^313115551 is an apocalyptic number.

313115551 is a deficient number, since it is larger than the sum of its proper divisors (60860513).

313115551 is a wasteful number, since it uses less digits than its factorization.

313115551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22230.

The product of its digits is 1125, while the sum is 25.

The square root of 313115551 is about 17695.0713759510. The cubic root of 313115551 is about 679.0496752446.

Adding to 313115551 its reverse (155511313), we get a palindrome (468626864).

The spelling of 313115551 in words is "three hundred thirteen million, one hundred fifteen thousand, five hundred fifty-one".