55819018 has 4 divisors (see below), whose sum is σ = 83728530. Its totient is φ = 27909508.

The previous prime is 55818991. The next prime is 55819037. The reversal of 55819018 is 81091855.

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., 50168889 + 5650129 = 7083^2 + 2377^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13954753 + ... + 13954756.

Almost surely, 2^55819018 is an apocalyptic number.

55819018 is a deficient number, since it is larger than the sum of its proper divisors (27909512).

55819018 is a wasteful number, since it uses less digits than its factorization.

55819018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27909511.

The product of its (nonzero) digits is 14400, while the sum is 37.

The square root of 55819018 is about 7471.2126191134. The cubic root of 55819018 is about 382.1736416245.

The spelling of 55819018 in words is "fifty-five million, eight hundred nineteen thousand, eighteen".