51311315 has 16 divisors (see below), whose sum is σ = 67806720. Its totient is φ = 36964320.

The previous prime is 51311311. The next prime is 51311327.

51311315 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 51311315 - 2² = 51311311 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51311311) 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, 1526 + ... + 10244.

It is an arithmetic number, because the mean of its divisors is an integer number (4237920).

Almost surely, 2^51311315 is an apocalyptic number.

51311315 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51311315 is a deficient number, since it is larger than the sum of its proper divisors (16495405).

51311315 is a wasteful number, since it uses less digits than its factorization.

51311315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8842.

The product of its digits is 225, while the sum is 20.

The square root of 51311315 is about 7163.1916768993. The cubic root of 51311315 is about 371.5960152682.

It can be divided in two parts, 5131 and 1315, that added together give a palindrome (6446).

The spelling of 51311315 in words is "fifty-one million, three hundred eleven thousand, three hundred fifteen".