56165550 has 96 divisors (see below), whose sum is σ = 160704000. Its totient is φ = 12716160.

The previous prime is 56165537. The next prime is 56165573. The reversal of 56165550 is 5556165.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 156271 + ... + 156629.

It is an arithmetic number, because the mean of its divisors is an integer number (1674000).

Almost surely, 2^56165550 is an apocalyptic number.

56165550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 56165550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80352000).

56165550 is an abundant number, since it is smaller than the sum of its proper divisors (104538450).

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

56165550 is a wasteful number, since it uses less digits than its factorization.

56165550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530 (or 525 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 33.

The square root of 56165550 is about 7494.3678852856. The cubic root of 56165550 is about 382.9628725085.

The spelling of 56165550 in words is "fifty-six million, one hundred sixty-five thousand, five hundred fifty".