54021897 has 10 divisors (see below), whose sum is σ = 80699498. Its totient is φ = 36014544.

The previous prime is 54021881. The next prime is 54021901. The reversal of 54021897 is 79812045.

54021897 is a `hidden beast` number, since 540 + 21 + 8 + 97 = 666.

It can be written as a sum of positive squares in only one way, i.e., 53275401 + 746496 = 7299^2 + 864^2 .

It is not a de Polignac number, because 54021897 - 2⁴ = 54021881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54021857) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 333388 + ... + 333549.

Almost surely, 2^54021897 is an apocalyptic number.

It is an amenable number.

54021897 is a deficient number, since it is larger than the sum of its proper divisors (26677601).

54021897 is an equidigital number, since it uses as much as digits as its factorization.

54021897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666949 (or 666940 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 54021897 is about 7349.9589794774. The cubic root of 54021897 is about 378.0273978630.

The spelling of 54021897 in words is "fifty-four million, twenty-one thousand, eight hundred ninety-seven".