55998818 has 4 divisors (see below), whose sum is σ = 83998230. Its totient is φ = 27999408.

The previous prime is 55998809. The next prime is 55998823. The reversal of 55998818 is 81889955.

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., 41383489 + 14615329 = 6433^2 + 3823^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 55998818.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13999703 + ... + 13999706.

Almost surely, 2^55998818 is an apocalyptic number.

55998818 is a deficient number, since it is larger than the sum of its proper divisors (27999412).

55998818 is a wasteful number, since it uses less digits than its factorization.

55998818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27999411.

The product of its digits is 1036800, while the sum is 53.

The square root of 55998818 is about 7483.2357974342. The cubic root of 55998818 is about 382.5835447681.

The spelling of 55998818 in words is "fifty-five million, nine hundred ninety-eight thousand, eight hundred eighteen".