56215278 has 48 divisors (see below), whose sum is σ = 141298560. Its totient is φ = 15819408.

The previous prime is 56215241. The next prime is 56215279. The reversal of 56215278 is 87251265.

It is a happy number.

56215278 is a `hidden beast` number, since 5 + 621 + 5 + 27 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56215279) 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, 5113 + ... + 11771.

It is an arithmetic number, because the mean of its divisors is an integer number (2943720).

Almost surely, 2^56215278 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56215278, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70649280).

56215278 is an abundant number, since it is smaller than the sum of its proper divisors (85083282).

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

56215278 is a wasteful number, since it uses less digits than its factorization.

56215278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6741 (or 6738 counting only the distinct ones).

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

The square root of 56215278 is about 7497.6848426698. The cubic root of 56215278 is about 383.0758620551.

The spelling of 56215278 in words is "fifty-six million, two hundred fifteen thousand, two hundred seventy-eight".