55820243 has 8 divisors (see below), whose sum is σ = 57795456. Its totient is φ = 53856000.

The previous prime is 55820227. The next prime is 55820267. The reversal of 55820243 is 34202855.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55820243 - 2⁴ = 55820227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55820293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8393 + ... + 13493.

It is an arithmetic number, because the mean of its divisors is an integer number (7224432).

Almost surely, 2^55820243 is an apocalyptic number.

55820243 is a deficient number, since it is larger than the sum of its proper divisors (1975213).

55820243 is a wasteful number, since it uses less digits than its factorization.

55820243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5485.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 55820243 is about 7471.2946000007. The cubic root of 55820243 is about 382.1764373221.

The spelling of 55820243 in words is "fifty-five million, eight hundred twenty thousand, two hundred forty-three".