55533555 has 144 divisors (see below), whose sum is σ = 127475712. Its totient is φ = 21859200.

The previous prime is 55533547. The next prime is 55533563.

55533555 is a `hidden beast` number, since 55 + 53 + 3 + 555 = 666.

55533555 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (55533547) and next prime (55533563).

It is not a de Polignac number, because 55533555 - 2³ = 55533547 is a prime.

It is a nude number because it is divisible by every one of its digits.

It is a zygodrome in base 10.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1181542 + ... + 1181588.

It is an arithmetic number, because the mean of its divisors is an integer number (885248).

Almost surely, 2^55533555 is an apocalyptic number.

55533555 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55533555 is an abundant number, since it is smaller than the sum of its proper divisors (71942157).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55533555 is a wasteful number, since it uses less digits than its factorization.

55533555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118 (or 104 counting only the distinct ones).

The product of its digits is 140625, while the sum is 36.

The square root of 55533555 is about 7452.0839367254. The cubic root of 55533555 is about 381.5210388356.

The spelling of 55533555 in words is "fifty-five million, five hundred thirty-three thousand, five hundred fifty-five".