51513212235 has 16 divisors (see below), whose sum is σ = 87269442336. Its totient is φ = 25857612288.

The previous prime is 51513212221. The next prime is 51513212273. The reversal of 51513212235 is 53221231515.

It is not a de Polignac number, because 51513212235 - 2⁸ = 51513211979 is a prime.

It is a super-2 number, since 2×51513212235² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101006044 + ... + 101006553.

It is an arithmetic number, because the mean of its divisors is an integer number (5454340146).

Almost surely, 2^51513212235 is an apocalyptic number.

51513212235 is a deficient number, since it is larger than the sum of its proper divisors (35756230101).

51513212235 is a wasteful number, since it uses less digits than its factorization.

51513212235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202012622.

The product of its digits is 9000, while the sum is 30.

The spelling of 51513212235 in words is "fifty-one billion, five hundred thirteen million, two hundred twelve thousand, two hundred thirty-five".