54521990 has 8 divisors (see below), whose sum is σ = 98139600. Its totient is φ = 21808792.

The previous prime is 54521981. The next prime is 54522007. The reversal of 54521990 is 9912545.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 54521990.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2726090 + ... + 2726109.

It is an arithmetic number, because the mean of its divisors is an integer number (12267450).

Almost surely, 2^54521990 is an apocalyptic number.

54521990 is a deficient number, since it is larger than the sum of its proper divisors (43617610).

54521990 is a wasteful number, since it uses less digits than its factorization.

54521990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5452206.

The product of its (nonzero) digits is 16200, while the sum is 35.

The square root of 54521990 is about 7383.9007306437. The cubic root of 54521990 is about 379.1903119873.

The spelling of 54521990 in words is "fifty-four million, five hundred twenty-one thousand, nine hundred ninety".