55552231 has 12 divisors (see below), whose sum is σ = 64781640. Its totient is φ = 47498640.

The previous prime is 55552229. The next prime is 55552241. The reversal of 55552231 is 13225555.

It is not a de Polignac number, because 55552231 - 2¹ = 55552229 is a prime.

It is a super-2 number, since 2×55552231² = 6172100738154722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55552231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55552241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22905 + ... + 25213.

It is an arithmetic number, because the mean of its divisors is an integer number (5398470).

Almost surely, 2^55552231 is an apocalyptic number.

55552231 is a deficient number, since it is larger than the sum of its proper divisors (9229409).

55552231 is a wasteful number, since it uses less digits than its factorization.

55552231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2814 (or 2807 counting only the distinct ones).

The product of its digits is 7500, while the sum is 28.

The square root of 55552231 is about 7453.3369036962. The cubic root of 55552231 is about 381.5638027004.

Adding to 55552231 its reverse (13225555), we get a palindrome (68777786).

The spelling of 55552231 in words is "fifty-five million, five hundred fifty-two thousand, two hundred thirty-one".