55566238 has 32 divisors (see below), whose sum is σ = 103561920. Its totient is φ = 21772800.

The previous prime is 55566197. The next prime is 55566239. The reversal of 55566238 is 83266555.

It is a self number, because there is not a number n which added to its sum of digits gives 55566238.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55566239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18438 + ... + 21238.

It is an arithmetic number, because the mean of its divisors is an integer number (3236310).

Almost surely, 2^55566238 is an apocalyptic number.

55566238 is a deficient number, since it is larger than the sum of its proper divisors (47995682).

55566238 is a wasteful number, since it uses less digits than its factorization.

55566238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2932.

The product of its digits is 216000, while the sum is 40.

The square root of 55566238 is about 7454.2764907132. The cubic root of 55566238 is about 381.5958693097.

The spelling of 55566238 in words is "fifty-five million, five hundred sixty-six thousand, two hundred thirty-eight".