51521531512 has 16 divisors (see below), whose sum is σ = 105384951000. Its totient is φ = 23418877920.

The previous prime is 51521531461. The next prime is 51521531519. The reversal of 51521531512 is 21513512515.

It is a super-2 number, since 2×51521531512² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51521531519) 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 3 ways as a sum of consecutive naturals, for example, 292735887 + ... + 292736062.

Almost surely, 2^51521531512 is an apocalyptic number.

It is an amenable number.

51521531512 is an abundant number, since it is smaller than the sum of its proper divisors (53863419488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51521531512 is a wasteful number, since it uses less digits than its factorization.

51521531512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585471966 (or 585471962 counting only the distinct ones).

The product of its digits is 7500, while the sum is 31.

The spelling of 51521531512 in words is "fifty-one billion, five hundred twenty-one million, five hundred thirty-one thousand, five hundred twelve".