55255550 has 48 divisors (see below), whose sum is σ = 119992320. Its totient is φ = 18536160.

The previous prime is 55255517. The next prime is 55255573. The reversal of 55255550 is 5555255.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14771 + ... + 18129.

It is an arithmetic number, because the mean of its divisors is an integer number (2499840).

Almost surely, 2^55255550 is an apocalyptic number.

55255550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55255550 is an abundant number, since it is smaller than the sum of its proper divisors (64736770).

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

55255550 is a wasteful number, since it uses less digits than its factorization.

55255550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3425 (or 3420 counting only the distinct ones).

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

The square root of 55255550 is about 7433.4076976848. The cubic root of 55255550 is about 380.8833328602.

The spelling of 55255550 in words is "fifty-five million, two hundred fifty-five thousand, five hundred fifty".