56221536 has 48 divisors (see below), whose sum is σ = 168666624. Its totient is φ = 16063104.

The previous prime is 56221531. The next prime is 56221547. The reversal of 56221536 is 63512265.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×56221536² = 6321722220398592, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56221531) 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, 41160 + ... + 42503.

It is an arithmetic number, because the mean of its divisors is an integer number (3513888).

Almost surely, 2^56221536 is an apocalyptic number.

56221536 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

56221536 is an abundant number, since it is smaller than the sum of its proper divisors (112445088).

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

56221536 is a wasteful number, since it uses less digits than its factorization.

56221536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83683 (or 83675 counting only the distinct ones).

The product of its digits is 10800, while the sum is 30.

The square root of 56221536 is about 7498.1021598802. The cubic root of 56221536 is about 383.0900764578.

The spelling of 56221536 in words is "fifty-six million, two hundred twenty-one thousand, five hundred thirty-six".