55057550 has 24 divisors (see below), whose sum is σ = 105713472. Its totient is φ = 21312000.

The previous prime is 55057537. The next prime is 55057553. The reversal of 55057550 is 5575055.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55057553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16211 + ... + 19310.

It is an arithmetic number, because the mean of its divisors is an integer number (4404728).

Almost surely, 2^55057550 is an apocalyptic number.

55057550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55057550 is a deficient number, since it is larger than the sum of its proper divisors (50655922).

55057550 is a wasteful number, since it uses less digits than its factorization.

55057550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35564 (or 35559 counting only the distinct ones).

The product of its (nonzero) digits is 21875, while the sum is 32.

The square root of 55057550 is about 7420.0774928568. The cubic root of 55057550 is about 380.4278422112.

The spelling of 55057550 in words is "fifty-five million, fifty-seven thousand, five hundred fifty".