54557809 has 4 divisors (see below), whose sum is σ = 55215216. Its totient is φ = 53900404.

The previous prime is 54557807. The next prime is 54557837. The reversal of 54557809 is 90875545.

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 54557809 - 2¹ = 54557807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54557807) 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, 328579 + ... + 328744.

It is an arithmetic number, because the mean of its divisors is an integer number (13803804).

Almost surely, 2^54557809 is an apocalyptic number.

It is an amenable number.

54557809 is a deficient number, since it is larger than the sum of its proper divisors (657407).

54557809 is an equidigital number, since it uses as much as digits as its factorization.

54557809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657406.

The product of its (nonzero) digits is 252000, while the sum is 43.

The square root of 54557809 is about 7386.3258119311. The cubic root of 54557809 is about 379.2733319732.

The spelling of 54557809 in words is "fifty-four million, five hundred fifty-seven thousand, eight hundred nine".