55833581 has 4 divisors (see below), whose sum is σ = 58261152. Its totient is φ = 53406012.

The previous prime is 55833577. The next prime is 55833587. The reversal of 55833581 is 18533855.

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 55833581 - 2² = 55833577 is a prime.

It is a super-2 number, since 2×55833581² = 6234777534567122, 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 (55833587) 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, 1213751 + ... + 1213796.

It is an arithmetic number, because the mean of its divisors is an integer number (14565288).

Almost surely, 2^55833581 is an apocalyptic number.

It is an amenable number.

55833581 is a deficient number, since it is larger than the sum of its proper divisors (2427571).

55833581 is a wasteful number, since it uses less digits than its factorization.

55833581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2427570.

The product of its digits is 72000, while the sum is 38.

The square root of 55833581 is about 7472.1871630735. The cubic root of 55833581 is about 382.2068746873.

The spelling of 55833581 in words is "fifty-five million, eight hundred thirty-three thousand, five hundred eighty-one".