54988821 has 8 divisors (see below), whose sum is σ = 81464960. Its totient is φ = 36659196.

The previous prime is 54988763. The next prime is 54988847. The reversal of 54988821 is 12888945.

It is a happy number.

54988821 is a `hidden beast` number, since 549 + 8 + 88 + 21 = 666.

It is not a de Polignac number, because 54988821 - 2⁶ = 54988757 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 (54988121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1018285 + ... + 1018338.

It is an arithmetic number, because the mean of its divisors is an integer number (10183120).

Almost surely, 2^54988821 is an apocalyptic number.

It is an amenable number.

54988821 is a deficient number, since it is larger than the sum of its proper divisors (26476139).

54988821 is a wasteful number, since it uses less digits than its factorization.

54988821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2036632 (or 2036626 counting only the distinct ones).

The product of its digits is 184320, while the sum is 45.

The square root of 54988821 is about 7415.4447607679. Note that the first 3 decimals coincide. The cubic root of 54988821 is about 380.2694787512.

The spelling of 54988821 in words is "fifty-four million, nine hundred eighty-eight thousand, eight hundred twenty-one".