54575621 has 4 divisors (see below), whose sum is σ = 54720000. Its totient is φ = 54431244.

The previous prime is 54575617. The next prime is 54575623. The reversal of 54575621 is 12657545.

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 54575621 - 2² = 54575617 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 (54575623) 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, 71621 + ... + 72378.

It is an arithmetic number, because the mean of its divisors is an integer number (13680000).

Almost surely, 2^54575621 is an apocalyptic number.

It is an amenable number.

54575621 is a deficient number, since it is larger than the sum of its proper divisors (144379).

54575621 is a wasteful number, since it uses less digits than its factorization.

54575621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144378.

The product of its digits is 42000, while the sum is 35.

The square root of 54575621 is about 7387.5314550938. The cubic root of 54575621 is about 379.3146024571.

The spelling of 54575621 in words is "fifty-four million, five hundred seventy-five thousand, six hundred twenty-one".