55818973 has 16 divisors (see below), whose sum is σ = 68563584. Its totient is φ = 44352000.

The previous prime is 55818937. The next prime is 55818991. The reversal of 55818973 is 37981855.

It is a de Polignac number, because none of the positive numbers 2^k-55818973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55818923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4473 + ... + 11473.

It is an arithmetic number, because the mean of its divisors is an integer number (4285224).

Almost surely, 2^55818973 is an apocalyptic number.

It is an amenable number.

55818973 is a deficient number, since it is larger than the sum of its proper divisors (12744611).

55818973 is a wasteful number, since it uses less digits than its factorization.

55818973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7092.

The product of its digits is 302400, while the sum is 46.

The square root of 55818973 is about 7471.2096075535. The cubic root of 55818973 is about 382.1735389246.

The spelling of 55818973 in words is "fifty-five million, eight hundred eighteen thousand, nine hundred seventy-three".