55055399 has 8 divisors (see below), whose sum is σ = 65656320. Its totient is φ = 45138456.

The previous prime is 55055387. The next prime is 55055417. The reversal of 55055399 is 99355055.

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 55055399 - 2¹⁶ = 54989863 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 (55055699) 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, 170819 + ... + 171140.

It is an arithmetic number, because the mean of its divisors is an integer number (8207040).

Almost surely, 2^55055399 is an apocalyptic number.

55055399 is a deficient number, since it is larger than the sum of its proper divisors (10600921).

55055399 is a wasteful number, since it uses less digits than its factorization.

55055399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341989.

The product of its (nonzero) digits is 151875, while the sum is 41.

The square root of 55055399 is about 7419.9325468632. The cubic root of 55055399 is about 380.4228879349.

The spelling of 55055399 in words is "fifty-five million, fifty-five thousand, three hundred ninety-nine".