54417921 has 4 divisors (see below), whose sum is σ = 72557232. Its totient is φ = 36278612.

The previous prime is 54417911. The next prime is 54417941. The reversal of 54417921 is 12971445.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 54417921 - 2⁵ = 54417889 is a prime.

It is a super-3 number, since 3×54417921³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (54417911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9069651 + ... + 9069656.

It is an arithmetic number, because the mean of its divisors is an integer number (18139308).

Almost surely, 2^54417921 is an apocalyptic number.

It is an amenable number.

54417921 is a deficient number, since it is larger than the sum of its proper divisors (18139311).

54417921 is a wasteful number, since it uses less digits than its factorization.

54417921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18139310.

The product of its digits is 10080, while the sum is 33.

The square root of 54417921 is about 7376.8503441510. The cubic root of 54417921 is about 378.9488981349.

The spelling of 54417921 in words is "fifty-four million, four hundred seventeen thousand, nine hundred twenty-one".