56505570 has 64 divisors (see below), whose sum is σ = 149796864. Its totient is φ = 13526720.

The previous prime is 56505557. The next prime is 56505607. The reversal of 56505570 is 7550565.

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26359 + ... + 28421.

It is an arithmetic number, because the mean of its divisors is an integer number (2340576).

Almost surely, 2^56505570 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56505570, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74898432).

56505570 is an abundant number, since it is smaller than the sum of its proper divisors (93291294).

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

56505570 is a wasteful number, since it uses less digits than its factorization.

56505570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2167.

The product of its (nonzero) digits is 26250, while the sum is 33.

The square root of 56505570 is about 7517.0186909439. The cubic root of 56505570 is about 383.7341231358.

It can be divided in two parts, 56505 and 570, that added together give a palindrome (57075).

The spelling of 56505570 in words is "fifty-six million, five hundred five thousand, five hundred seventy".