55188243 has 16 divisors (see below), whose sum is σ = 89193600. Its totient is φ = 33447240.

The previous prime is 55188241. The next prime is 55188251. The reversal of 55188243 is 34288155.

It is a happy number.

55188243 is a `hidden beast` number, since 551 + 88 + 24 + 3 = 666.

It is not a de Polignac number, because 55188243 - 2¹ = 55188241 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55188198 and 55188207.

It is not an unprimeable number, because it can be changed into a prime (55188241) 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, 92613 + ... + 93206.

It is an arithmetic number, because the mean of its divisors is an integer number (5574600).

Almost surely, 2^55188243 is an apocalyptic number.

55188243 is a deficient number, since it is larger than the sum of its proper divisors (34005357).

55188243 is a wasteful number, since it uses less digits than its factorization.

55188243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185839 (or 185833 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The square root of 55188243 is about 7428.8789867651. The cubic root of 55188243 is about 380.7286182015.

The spelling of 55188243 in words is "fifty-five million, one hundred eighty-eight thousand, two hundred forty-three".