54520621 has 4 divisors (see below), whose sum is σ = 54535552. Its totient is φ = 54505692.

The previous prime is 54520619. The next prime is 54520643. The reversal of 54520621 is 12602545.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 54520621 - 2¹ = 54520619 is a prime.

It is a super-2 number, since 2×54520621² = 5944996228451282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54520691) 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, 2086 + ... + 10648.

It is an arithmetic number, because the mean of its divisors is an integer number (13633888).

Almost surely, 2^54520621 is an apocalyptic number.

It is an amenable number.

54520621 is a deficient number, since it is larger than the sum of its proper divisors (14931).

54520621 is an equidigital number, since it uses as much as digits as its factorization.

54520621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14930.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 54520621 is about 7383.8080283821. The cubic root of 54520621 is about 379.1871382472.

The spelling of 54520621 in words is "fifty-four million, five hundred twenty thousand, six hundred twenty-one".