55552550 has 24 divisors (see below), whose sum is σ = 103962096. Its totient is φ = 22084640.

The previous prime is 55552547. The next prime is 55552573. The reversal of 55552550 is 5525555.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5024 + ... + 11676.

It is an arithmetic number, because the mean of its divisors is an integer number (4331754).

Almost surely, 2^55552550 is an apocalyptic number.

55552550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55552550 is a deficient number, since it is larger than the sum of its proper divisors (48409546).

55552550 is a wasteful number, since it uses less digits than its factorization.

55552550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6832 (or 6827 counting only the distinct ones).

The product of its (nonzero) digits is 31250, while the sum is 32.

The square root of 55552550 is about 7453.3583034764. The cubic root of 55552550 is about 381.5645330559.

It can be divided in two parts, 5 and 5552550, that added together give a palindrome (5552555).

The spelling of 55552550 in words is "fifty-five million, five hundred fifty-two thousand, five hundred fifty".