56217528 has 24 divisors (see below), whose sum is σ = 152256000. Its totient is φ = 18739152.

The previous prime is 56217527. The next prime is 56217529. The reversal of 56217528 is 82571265.

It is a happy number.

56217528 is a `hidden beast` number, since 5 + 621 + 7 + 5 + 28 = 666.

It is an interprime number because it is at equal distance from previous prime (56217527) and next prime (56217529).

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 56217492 and 56217501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56217527) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 390328 + ... + 390471.

It is an arithmetic number, because the mean of its divisors is an integer number (6344000).

Almost surely, 2^56217528 is an apocalyptic number.

It is an amenable number.

56217528 is an abundant number, since it is smaller than the sum of its proper divisors (96038472).

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

56217528 is a wasteful number, since it uses less digits than its factorization.

56217528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780811 (or 780804 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 56217528 is about 7497.8348874859. The cubic root of 56217528 is about 383.0809728199.

The spelling of 56217528 in words is "fifty-six million, two hundred seventeen thousand, five hundred twenty-eight".