54558021 has 12 divisors (see below), whose sum is σ = 84620832. Its totient is φ = 31175928.

The previous prime is 54557999. The next prime is 54558029. The reversal of 54558021 is 12085545.

It is not a de Polignac number, because 54558021 - 2⁶ = 54557957 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 54558021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54558029) 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, 185425 + ... + 185718.

It is an arithmetic number, because the mean of its divisors is an integer number (7051736).

Almost surely, 2^54558021 is an apocalyptic number.

It is an amenable number.

54558021 is a deficient number, since it is larger than the sum of its proper divisors (30062811).

54558021 is a wasteful number, since it uses less digits than its factorization.

54558021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371160 (or 371153 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 30.

The square root of 54558021 is about 7386.3401627599. The cubic root of 54558021 is about 379.2738232310.

The spelling of 54558021 in words is "fifty-four million, five hundred fifty-eight thousand, twenty-one".