51515124031 has 16 divisors (see below), whose sum is σ = 59282634240. Its totient is φ = 43850328480.

The previous prime is 51515124019. The next prime is 51515124047. The reversal of 51515124031 is 13042151515.

It is not a de Polignac number, because 51515124031 - 2⁷ = 51515123903 is a prime.

It is a super-2 number, since 2×51515124031² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51515124131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 921366 + ... + 975676.

It is an arithmetic number, because the mean of its divisors is an integer number (3705164640).

Almost surely, 2^51515124031 is an apocalyptic number.

51515124031 is a deficient number, since it is larger than the sum of its proper divisors (7767510209).

51515124031 is a wasteful number, since it uses less digits than its factorization.

51515124031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55254.

The product of its (nonzero) digits is 3000, while the sum is 28.

Adding to 51515124031 its reverse (13042151515), we get a palindrome (64557275546).

The spelling of 51515124031 in words is "fifty-one billion, five hundred fifteen million, one hundred twenty-four thousand, thirty-one".