55999955 has 32 divisors (see below), whose sum is σ = 78522048. Its totient is φ = 37888000.

The previous prime is 55999913. The next prime is 55999961.

55999955 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 55999955 - 2²² = 51805651 is a prime.

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 55999955.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 94139 + ... + 94731.

It is an arithmetic number, because the mean of its divisors is an integer number (2453814).

Almost surely, 2^55999955 is an apocalyptic number.

55999955 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55999955 is a deficient number, since it is larger than the sum of its proper divisors (22522093).

55999955 is a wasteful number, since it uses less digits than its factorization.

55999955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727.

The product of its digits is 4100625, while the sum is 56.

The square root of 55999955 is about 7483.3117668583. The cubic root of 55999955 is about 382.5861340760.

The spelling of 55999955 in words is "fifty-five million, nine hundred ninety-nine thousand, nine hundred fifty-five".