55530717 has 24 divisors (see below), whose sum is σ = 84463008. Its totient is φ = 32181600.

The previous prime is 55530667. The next prime is 55530719. The reversal of 55530717 is 71703555.

It is a de Polignac number, because none of the positive numbers 2^k-55530717 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55530719) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15867 + ... + 19047.

It is an arithmetic number, because the mean of its divisors is an integer number (3519292).

Almost surely, 2^55530717 is an apocalyptic number.

It is an amenable number.

55530717 is a deficient number, since it is larger than the sum of its proper divisors (28932291).

55530717 is a wasteful number, since it uses less digits than its factorization.

55530717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3241 (or 3218 counting only the distinct ones).

The product of its (nonzero) digits is 18375, while the sum is 33.

The square root of 55530717 is about 7451.8935177578. The cubic root of 55530717 is about 381.5145396109.

The spelling of 55530717 in words is "fifty-five million, five hundred thirty thousand, seven hundred seventeen".