51231166554 has 16 divisors (see below), whose sum is σ = 104845178592. Its totient is φ = 16679914608.

The previous prime is 51231166537. The next prime is 51231166589. The reversal of 51231166554 is 45566113215.

It is a Curzon 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, 99284949 + ... + 99285464.

It is an arithmetic number, because the mean of its divisors is an integer number (6552823662).

Almost surely, 2^51231166554 is an apocalyptic number.

51231166554 is an abundant number, since it is smaller than the sum of its proper divisors (53614012038).

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

51231166554 is a wasteful number, since it uses less digits than its factorization.

51231166554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198570461.

The product of its digits is 108000, while the sum is 39.

Adding to 51231166554 its reverse (45566113215), we get a palindrome (96797279769).

The spelling of 51231166554 in words is "fifty-one billion, two hundred thirty-one million, one hundred sixty-six thousand, five hundred fifty-four".