56221240 has 16 divisors (see below), whose sum is σ = 126497880. Its totient is φ = 22488480.

The previous prime is 56221213. The next prime is 56221273. The reversal of 56221240 is 4212265.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 702726 + ... + 702805.

Almost surely, 2^56221240 is an apocalyptic number.

It is an amenable number.

56221240 is an abundant number, since it is smaller than the sum of its proper divisors (70276640).

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

56221240 is a wasteful number, since it uses less digits than its factorization.

56221240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1405542 (or 1405538 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 56221240 is about 7498.0824215262. The cubic root of 56221240 is about 383.0894041480.

The spelling of 56221240 in words is "fifty-six million, two hundred twenty-one thousand, two hundred forty".