55200231 has 16 divisors (see below), whose sum is σ = 83520000. Its totient is φ = 36016344.

The previous prime is 55200209. The next prime is 55200239. The reversal of 55200231 is 13200255.

It is a happy number.

It is not a de Polignac number, because 55200231 - 2¹⁸ = 54938087 is a prime.

It is a super-2 number, since 2×55200231² = 6094131004906722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55200239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20481 + ... + 23018.

It is an arithmetic number, because the mean of its divisors is an integer number (5220000).

Almost surely, 2^55200231 is an apocalyptic number.

55200231 is a deficient number, since it is larger than the sum of its proper divisors (28319769).

55200231 is a wasteful number, since it uses less digits than its factorization.

55200231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43555 (or 43549 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 55200231 is about 7429.6857941638. The cubic root of 55200231 is about 380.7561835185.

Adding to 55200231 its reverse (13200255), we get a palindrome (68400486).

The spelling of 55200231 in words is "fifty-five million, two hundred thousand, two hundred thirty-one".