56221110 has 96 divisors (see below), whose sum is σ = 161235360. Its totient is φ = 13478400.

The previous prime is 56221079. The next prime is 56221141. The reversal of 56221110 is 1112265.

It is an interprime number because it is at equal distance from previous prime (56221079) and next prime (56221141).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 107650 + ... + 108170.

It is an arithmetic number, because the mean of its divisors is an integer number (1679535).

Almost surely, 2^56221110 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56221110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80617680).

56221110 is an abundant number, since it is smaller than the sum of its proper divisors (105014250).

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

56221110 is a wasteful number, since it uses less digits than its factorization.

56221110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654 (or 651 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 56221110 is about 7498.0737526381. The cubic root of 56221110 is about 383.0891088761.

Adding to 56221110 its reverse (1112265), we get a palindrome (57333375).

The spelling of 56221110 in words is "fifty-six million, two hundred twenty-one thousand, one hundred ten".