56225221 has 8 divisors (see below), whose sum is σ = 60651360. Its totient is φ = 51813552.

The previous prime is 56225203. The next prime is 56225231. The reversal of 56225221 is 12252265.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56225221 - 2⁵ = 56225189 is a prime.

It is a super-2 number, since 2×56225221² = 6322550952997682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56225201) 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, 5286 + ... + 11848.

It is an arithmetic number, because the mean of its divisors is an integer number (7581420).

Almost surely, 2^56225221 is an apocalyptic number.

It is an amenable number.

56225221 is a deficient number, since it is larger than the sum of its proper divisors (4426139).

56225221 is a wasteful number, since it uses less digits than its factorization.

56225221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7235.

The product of its digits is 2400, while the sum is 25.

The square root of 56225221 is about 7498.3478847010. The cubic root of 56225221 is about 383.0984460625.

Adding to 56225221 its reverse (12252265), we get a palindrome (68477486).

It can be divided in two parts, 5 and 6225221, that added together give a palindrome (6225226).

The spelling of 56225221 in words is "fifty-six million, two hundred twenty-five thousand, two hundred twenty-one".