51515234331 has 16 divisors (see below), whose sum is σ = 78189131520. Its totient is φ = 29863903520.

The previous prime is 51515234327. The next prime is 51515234341. The reversal of 51515234331 is 13343251515.

It is not a de Polignac number, because 51515234331 - 2² = 51515234327 is a prime.

It is a super-2 number, since 2×51515234331² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 51515234292 and 51515234301.

It is not an unprimeable number, because it can be changed into a prime (51515234311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33935496 + ... + 33937013.

It is an arithmetic number, because the mean of its divisors is an integer number (4886820720).

Almost surely, 2^51515234331 is an apocalyptic number.

51515234331 is a deficient number, since it is larger than the sum of its proper divisors (26673897189).

51515234331 is a wasteful number, since it uses less digits than its factorization.

51515234331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67872546.

The product of its digits is 27000, while the sum is 33.

Adding to 51515234331 its reverse (13343251515), we get a palindrome (64858485846).

The spelling of 51515234331 in words is "fifty-one billion, five hundred fifteen million, two hundred thirty-four thousand, three hundred thirty-one".