54918721 has 64 divisors (see below), whose sum is σ = 76204800. Its totient is φ = 38707200.

The previous prime is 54918719. The next prime is 54918769. The reversal of 54918721 is 12781945.

It is a cyclic number.

It is not a de Polignac number, because 54918721 - 2¹ = 54918719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54918121) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1339461 + ... + 1339501.

It is an arithmetic number, because the mean of its divisors is an integer number (1190700).

Almost surely, 2^54918721 is an apocalyptic number.

It is an amenable number.

54918721 is a deficient number, since it is larger than the sum of its proper divisors (21286079).

54918721 is a wasteful number, since it uses less digits than its factorization.

54918721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130.

The product of its digits is 20160, while the sum is 37.

The square root of 54918721 is about 7410.7166320134. The cubic root of 54918721 is about 380.1078202816.

The spelling of 54918721 in words is "fifty-four million, nine hundred eighteen thousand, seven hundred twenty-one".