54522021 has 16 divisors (see below), whose sum is σ = 75273984. Its totient is φ = 35080704.

The previous prime is 54522019. The next prime is 54522037. The reversal of 54522021 is 12022545.

It is a happy number.

It is not a de Polignac number, because 54522021 - 2¹ = 54522019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54522011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7645 + ... + 12941.

It is an arithmetic number, because the mean of its divisors is an integer number (4704624).

Almost surely, 2^54522021 is an apocalyptic number.

It is an amenable number.

54522021 is a deficient number, since it is larger than the sum of its proper divisors (20751963).

54522021 is a wasteful number, since it uses less digits than its factorization.

54522021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5420.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 54522021 is about 7383.9028298048. The cubic root of 54522021 is about 379.1903838537.

Adding to 54522021 its reverse (12022545), we get a palindrome (66544566).

The spelling of 54522021 in words is "fifty-four million, five hundred twenty-two thousand, twenty-one".