56221304 has 16 divisors (see below), whose sum is σ = 110963400. Its totient is φ = 26631072.

The previous prime is 56221301. The next prime is 56221309. The reversal of 56221304 is 40312265.

It is a super-4 number, since 4×56221304⁴ (a number of 32 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 56221304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56221301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 184787 + ... + 185090.

Almost surely, 2^56221304 is an apocalyptic number.

It is an amenable number.

56221304 is a deficient number, since it is larger than the sum of its proper divisors (54742096).

56221304 is a wasteful number, since it uses less digits than its factorization.

56221304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369902 (or 369898 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 56221304 is about 7498.0866892828. The cubic root of 56221304 is about 383.0895495125.

Adding to 56221304 its reverse (40312265), we get a palindrome (96533569).

The spelling of 56221304 in words is "fifty-six million, two hundred twenty-one thousand, three hundred four".