56221550040 has 128 divisors (see below), whose sum is σ = 169772137920. Its totient is φ = 14894284800.

The previous prime is 56221550027. The next prime is 56221550041. The reversal of 56221550040 is 4005512265.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56221550041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13330012 + ... + 13334228.

Almost surely, 2^56221550040 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 56221550040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84886068960).

56221550040 is an abundant number, since it is smaller than the sum of its proper divisors (113550587880).

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

56221550040 is a wasteful number, since it uses less digits than its factorization.

56221550040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4933 (or 4929 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The spelling of 56221550040 in words is "fifty-six billion, two hundred twenty-one million, five hundred fifty thousand, forty".