54223621 has 4 divisors (see below), whose sum is σ = 54359244. Its totient is φ = 54088000.

The previous prime is 54223583. The next prime is 54223639. The reversal of 54223621 is 12632245.

54223621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 51122500 + 3101121 = 7150^2 + 1761^2 .

It is a cyclic number.

It is not a de Polignac number, because 54223621 - 2⁷ = 54223493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54223661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67210 + ... + 68011.

It is an arithmetic number, because the mean of its divisors is an integer number (13589811).

Almost surely, 2^54223621 is an apocalyptic number.

It is an amenable number.

54223621 is a deficient number, since it is larger than the sum of its proper divisors (135623).

54223621 is a wasteful number, since it uses less digits than its factorization.

54223621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135622.

The product of its digits is 2880, while the sum is 25.

The square root of 54223621 is about 7363.6689903879. The cubic root of 54223621 is about 378.4973460489.

Adding to 54223621 its reverse (12632245), we get a palindrome (66855866).

The spelling of 54223621 in words is "fifty-four million, two hundred twenty-three thousand, six hundred twenty-one".