55418399 has 8 divisors (see below), whose sum is σ = 56015232. Its totient is φ = 54825120.

The previous prime is 55418387. The next prime is 55418401. The reversal of 55418399 is 99381455.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55418399 - 2²⁰ = 54369823 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 (55418299) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39677 + ... + 41049.

It is an arithmetic number, because the mean of its divisors is an integer number (7001904).

Almost surely, 2^55418399 is an apocalyptic number.

55418399 is a deficient number, since it is larger than the sum of its proper divisors (596833).

55418399 is a wasteful number, since it uses less digits than its factorization.

55418399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1777.

The product of its digits is 194400, while the sum is 44.

The square root of 55418399 is about 7444.3534977861. The cubic root of 55418399 is about 381.2571452929.

The spelling of 55418399 in words is "fifty-five million, four hundred eighteen thousand, three hundred ninety-nine".