55558401 has 4 divisors (see below), whose sum is σ = 74077872. Its totient is φ = 37038932.

The previous prime is 55558381. The next prime is 55558427. The reversal of 55558401 is 10485555.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55558401 - 2⁵ = 55558369 is a prime.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (55558001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9259731 + ... + 9259736.

It is an arithmetic number, because the mean of its divisors is an integer number (18519468).

Almost surely, 2^55558401 is an apocalyptic number.

It is an amenable number.

55558401 is a deficient number, since it is larger than the sum of its proper divisors (18519471).

55558401 is a wasteful number, since it uses less digits than its factorization.

55558401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18519470.

The product of its (nonzero) digits is 20000, while the sum is 33.

The square root of 55558401 is about 7453.7508007714. The cubic root of 55558401 is about 381.5779285148.

The spelling of 55558401 in words is "fifty-five million, five hundred fifty-eight thousand, four hundred one".