51245867572 has 24 divisors (see below), whose sum is σ = 90844275200. Its totient is φ = 25290566496.

The previous prime is 51245867567. The next prime is 51245867587. The reversal of 51245867572 is 27576854215.

It is a super-2 number, since 2×51245867572² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1041829 + ... + 1089907.

Almost surely, 2^51245867572 is an apocalyptic number.

It is an amenable number.

51245867572 is a deficient number, since it is larger than the sum of its proper divisors (39598407628).

51245867572 is a wasteful number, since it uses less digits than its factorization.

51245867572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51535 (or 51533 counting only the distinct ones).

The product of its digits is 4704000, while the sum is 52.

The spelling of 51245867572 in words is "fifty-one billion, two hundred forty-five million, eight hundred sixty-seven thousand, five hundred seventy-two".