54221990 has 16 divisors (see below), whose sum is σ = 98975520. Its totient is φ = 21383040.

The previous prime is 54221987. The next prime is 54222001. The reversal of 54221990 is 9912245.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37475 + ... + 38894.

It is an arithmetic number, because the mean of its divisors is an integer number (6185970).

Almost surely, 2^54221990 is an apocalyptic number.

54221990 is a deficient number, since it is larger than the sum of its proper divisors (44753530).

54221990 is a wasteful number, since it uses less digits than its factorization.

54221990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76447.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 54221990 is about 7363.5582431322. The cubic root of 54221990 is about 378.4935510524.

The spelling of 54221990 in words is "fifty-four million, two hundred twenty-one thousand, nine hundred ninety".