51532623515 has 32 divisors (see below), whose sum is σ = 67098373056. Its totient is φ = 37842739200.

The previous prime is 51532623511. The next prime is 51532623521.

51532623515 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 51532623515 - 2² = 51532623511 is a prime.

It is a super-2 number, since 2×51532623515² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51532623511) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2552099 + ... + 2572211.

It is an arithmetic number, because the mean of its divisors is an integer number (2096824158).

Almost surely, 2^51532623515 is an apocalyptic number.

51532623515 is a deficient number, since it is larger than the sum of its proper divisors (15565749541).

51532623515 is a wasteful number, since it uses less digits than its factorization.

51532623515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20879.

The product of its digits is 135000, while the sum is 38.

The spelling of 51532623515 in words is "fifty-one billion, five hundred thirty-two million, six hundred twenty-three thousand, five hundred fifteen".