54551932821 has 12 divisors (see below), whose sum is σ = 82944459520. Its totient is φ = 34453852200.

The previous prime is 54551932789. The next prime is 54551932873. The reversal of 54551932821 is 12823915545.

54551932821 is a `hidden beast` number, since 5 + 4 + 551 + 93 + 2 + 8 + 2 + 1 = 666.

It is not a de Polignac number, because 54551932821 - 2⁵ = 54551932789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54551932021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 159508405 + ... + 159508746.

Almost surely, 2^54551932821 is an apocalyptic number.

It is an amenable number.

54551932821 is a deficient number, since it is larger than the sum of its proper divisors (28392526699).

54551932821 is a wasteful number, since it uses less digits than its factorization.

54551932821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319017176 (or 319017173 counting only the distinct ones).

The product of its digits is 432000, while the sum is 45.

The spelling of 54551932821 in words is "fifty-four billion, five hundred fifty-one million, nine hundred thirty-two thousand, eight hundred twenty-one".