55223618 has 4 divisors (see below), whose sum is σ = 82835430. Its totient is φ = 27611808.

The previous prime is 55223561. The next prime is 55223659. The reversal of 55223618 is 81632255.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 53042089 + 2181529 = 7283^2 + 1477^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13805903 + ... + 13805906.

Almost surely, 2^55223618 is an apocalyptic number.

55223618 is a deficient number, since it is larger than the sum of its proper divisors (27611812).

55223618 is a wasteful number, since it uses less digits than its factorization.

55223618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27611811.

The product of its digits is 14400, while the sum is 32.

The square root of 55223618 is about 7431.2595163942. The cubic root of 55223618 is about 380.8099483151.

The spelling of 55223618 in words is "fifty-five million, two hundred twenty-three thousand, six hundred eighteen".