54407621 has 4 divisors (see below), whose sum is σ = 57271200. Its totient is φ = 51544044.

The previous prime is 54407609. The next prime is 54407641. The reversal of 54407621 is 12670445.

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 54407621 - 2¹⁸ = 54145477 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54407641) 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, 1431761 + ... + 1431798.

It is an arithmetic number, because the mean of its divisors is an integer number (14317800).

Almost surely, 2^54407621 is an apocalyptic number.

It is an amenable number.

54407621 is a deficient number, since it is larger than the sum of its proper divisors (2863579).

54407621 is a wasteful number, since it uses less digits than its factorization.

54407621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2863578.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 54407621 is about 7376.1521811850. The cubic root of 54407621 is about 378.9249879973.

The spelling of 54407621 in words is "fifty-four million, four hundred seven thousand, six hundred twenty-one".