55711550 has 24 divisors (see below), whose sum is σ = 109720656. Its totient is φ = 20973440.

The previous prime is 55711501. The next prime is 55711561. The reversal of 55711550 is 5511755.

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, 31922 + ... + 33621.

It is an arithmetic number, because the mean of its divisors is an integer number (4571694).

Almost surely, 2^55711550 is an apocalyptic number.

55711550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55711550 is a deficient number, since it is larger than the sum of its proper divisors (54009106).

55711550 is a wasteful number, since it uses less digits than its factorization.

55711550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65572 (or 65567 counting only the distinct ones).

The product of its (nonzero) digits is 4375, while the sum is 29.

The square root of 55711550 is about 7464.0170149860. The cubic root of 55711550 is about 381.9282185602.

The spelling of 55711550 in words is "fifty-five million, seven hundred eleven thousand, five hundred fifty".