51227523698 has 30 divisors (see below), whose sum is σ = 83332498011. Its totient is φ = 23618505768.

The previous prime is 51227523689. The next prime is 51227523701. The reversal of 51227523698 is 89632572215.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 896809 + 51226626889 = 947^2 + 226333^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=160043.

It is a Duffinian number.

It is an unprimeable number.

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 14 ways as a sum of consecutive naturals, for example, 54094061 + ... + 54095007.

Almost surely, 2^51227523698 is an apocalyptic number.

51227523698 is a deficient number, since it is larger than the sum of its proper divisors (32104974313).

51227523698 is an frugal number, since it uses more digits than its factorization.

51227523698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1948 (or 962 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 50.

Multiplying 51227523698 by its sum of digits (50), we get a square (2561376184900 = 1600430²).

The spelling of 51227523698 in words is "fifty-one billion, two hundred twenty-seven million, five hundred twenty-three thousand, six hundred ninety-eight".