55540555 has 32 divisors (see below), whose sum is σ = 78796800. Its totient is φ = 36796032.

The previous prime is 55540549. The next prime is 55540559. The reversal of 55540555 is 55504555.

It is not a de Polignac number, because 55540555 - 2⁵ = 55540523 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55540555.

It is not an unprimeable number, because it can be changed into a prime (55540559) by changing a digit.

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, 146356 + ... + 146734.

It is an arithmetic number, because the mean of its divisors is an integer number (2462400).

Almost surely, 2^55540555 is an apocalyptic number.

55540555 is a deficient number, since it is larger than the sum of its proper divisors (23256245).

55540555 is a wasteful number, since it uses less digits than its factorization.

55540555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523.

The product of its (nonzero) digits is 62500, while the sum is 34.

The square root of 55540555 is about 7452.5535892069. The cubic root of 55540555 is about 381.5370683938.

The spelling of 55540555 in words is "fifty-five million, five hundred forty thousand, five hundred fifty-five".