55405959 has 16 divisors (see below), whose sum is σ = 87152640. Its totient is φ = 30638880.

The previous prime is 55405949. The next prime is 55405963. The reversal of 55405959 is 95950455.

It is not a de Polignac number, because 55405959 - 2⁴ = 55405943 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55405959.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55405949) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41904 + ... + 43205.

It is an arithmetic number, because the mean of its divisors is an integer number (5447040).

Almost surely, 2^55405959 is an apocalyptic number.

55405959 is a deficient number, since it is larger than the sum of its proper divisors (31746681).

55405959 is a wasteful number, since it uses less digits than its factorization.

55405959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85150.

The product of its (nonzero) digits is 202500, while the sum is 42.

The square root of 55405959 is about 7443.5179182964. The cubic root of 55405959 is about 381.2286156957.

The spelling of 55405959 in words is "fifty-five million, four hundred five thousand, nine hundred fifty-nine".