55189963 has 4 divisors (see below), whose sum is σ = 55393888. Its totient is φ = 54986040.

The previous prime is 55189961. The next prime is 55189969. The reversal of 55189963 is 36998155.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36998155 = 5 ⋅7399631.

It is a cyclic number.

It is not a de Polignac number, because 55189963 - 2¹ = 55189961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55189961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101556 + ... + 102097.

It is an arithmetic number, because the mean of its divisors is an integer number (13848472).

Almost surely, 2^55189963 is an apocalyptic number.

55189963 is a deficient number, since it is larger than the sum of its proper divisors (203925).

55189963 is a wasteful number, since it uses less digits than its factorization.

55189963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203924.

The product of its digits is 291600, while the sum is 46.

The square root of 55189963 is about 7428.9947503010. The cubic root of 55189963 is about 380.7325734305.

The spelling of 55189963 in words is "fifty-five million, one hundred eighty-nine thousand, nine hundred sixty-three".