55500555 has 32 divisors (see below), whose sum is σ = 99502848. Its totient is φ = 26179200.

The previous prime is 55500527. The next prime is 55500607.

55500555 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 55500555 - 2⁸ = 55500299 is a prime.

It is a zygodrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1560 + ... + 10650.

It is an arithmetic number, because the mean of its divisors is an integer number (3109464).

Almost surely, 2^55500555 is an apocalyptic number.

55500555 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55500555 is a deficient number, since it is larger than the sum of its proper divisors (44002293).

55500555 is a wasteful number, since it uses less digits than its factorization.

55500555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9147.

The product of its (nonzero) digits is 15625, while the sum is 30.

The square root of 55500555 is about 7449.8694619436. The cubic root of 55500555 is about 381.4454527690.

It can be divided in two parts, 55500 and 555, that multiplied together give a square (30802500 = 5550²).

The spelling of 55500555 in words is "fifty-five million, five hundred thousand, five hundred fifty-five".