56217776 has 40 divisors (see below), whose sum is σ = 119322720. Its totient is φ = 25539584.

The previous prime is 56217767. The next prime is 56217779. The reversal of 56217776 is 67771265.

56217776 = 9² + 10² + ... + 552².

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56217779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4325 + ... + 11451.

It is an arithmetic number, because the mean of its divisors is an integer number (2983068).

Almost surely, 2^56217776 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56217776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59661360).

56217776 is an abundant number, since it is smaller than the sum of its proper divisors (63104944).

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

56217776 is a wasteful number, since it uses less digits than its factorization.

56217776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7181 (or 7175 counting only the distinct ones).

The product of its digits is 123480, while the sum is 41.

The square root of 56217776 is about 7497.8514255752. The cubic root of 56217776 is about 383.0815361314.

The spelling of 56217776 in words is "fifty-six million, two hundred seventeen thousand, seven hundred seventy-six".