55504231 has 4 divisors (see below), whose sum is σ = 57418200. Its totient is φ = 53590264.

The previous prime is 55504223. The next prime is 55504249. The reversal of 55504231 is 13240555.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55504231 - 2³ = 55504223 is a prime.

It is a super-2 number, since 2×55504231² = 6161439317802722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55504196 and 55504205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55504261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 956941 + ... + 956998.

It is an arithmetic number, because the mean of its divisors is an integer number (14354550).

Almost surely, 2^55504231 is an apocalyptic number.

55504231 is a deficient number, since it is larger than the sum of its proper divisors (1913969).

55504231 is a wasteful number, since it uses less digits than its factorization.

55504231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1913968.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 55504231 is about 7450.1161735909. The cubic root of 55504231 is about 381.4538740814.

Adding to 55504231 its reverse (13240555), we get a palindrome (68744786).

The spelling of 55504231 in words is "fifty-five million, five hundred four thousand, two hundred thirty-one".