54238921 has 4 divisors (see below), whose sum is σ = 59169744. Its totient is φ = 49308100.

The previous prime is 54238913. The next prime is 54238937. The reversal of 54238921 is 12983245.

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 54238921 - 2³ = 54238913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54238321) 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, 2465395 + ... + 2465416.

It is an arithmetic number, because the mean of its divisors is an integer number (14792436).

Almost surely, 2^54238921 is an apocalyptic number.

It is an amenable number.

54238921 is a deficient number, since it is larger than the sum of its proper divisors (4930823).

54238921 is a wasteful number, since it uses less digits than its factorization.

54238921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4930822.

The product of its digits is 17280, while the sum is 34.

The square root of 54238921 is about 7364.7078013999. The cubic root of 54238921 is about 378.5329422504.

The spelling of 54238921 in words is "fifty-four million, two hundred thirty-eight thousand, nine hundred twenty-one".