55594821 has 4 divisors (see below), whose sum is σ = 74126432. Its totient is φ = 37063212.

The previous prime is 55594807. The next prime is 55594823. The reversal of 55594821 is 12849555.

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 not a de Polignac number, because 55594821 - 2⁵ = 55594789 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55594821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55594823) 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, 9265801 + ... + 9265806.

It is an arithmetic number, because the mean of its divisors is an integer number (18531608).

Almost surely, 2^55594821 is an apocalyptic number.

It is an amenable number.

55594821 is a deficient number, since it is larger than the sum of its proper divisors (18531611).

55594821 is a wasteful number, since it uses less digits than its factorization.

55594821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18531610.

The product of its digits is 72000, while the sum is 39.

The square root of 55594821 is about 7456.1934658376. The cubic root of 55594821 is about 381.6612884410.

The spelling of 55594821 in words is "fifty-five million, five hundred ninety-four thousand, eight hundred twenty-one".