55418999 has 4 divisors (see below), whose sum is σ = 55586760. Its totient is φ = 55251240.

The previous prime is 55418989. The next prime is 55419011. The reversal of 55418999 is 99981455.

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

It is a cyclic number.

It is not a de Polignac number, because 55418999 - 2²⁰ = 54370423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55418989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83384 + ... + 84045.

It is an arithmetic number, because the mean of its divisors is an integer number (13896690).

Almost surely, 2^55418999 is an apocalyptic number.

55418999 is a deficient number, since it is larger than the sum of its proper divisors (167761).

55418999 is a wasteful number, since it uses less digits than its factorization.

55418999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167760.

The product of its digits is 583200, while the sum is 50.

The square root of 55418999 is about 7444.3937966768. The cubic root of 55418999 is about 381.2585212106.

The spelling of 55418999 in words is "fifty-five million, four hundred eighteen thousand, nine hundred ninety-nine".