5681221 has 16 divisors (see below), whose sum is σ = 7056000. Its totient is φ = 4454208.

The previous prime is 5681201. The next prime is 5681227. The reversal of 5681221 is 1221865.

It is a cyclic number.

It is not a de Polignac number, because 5681221 - 2⁹ = 5680709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5681227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13350 + ... + 13768.

It is an arithmetic number, because the mean of its divisors is an integer number (441000).

Almost surely, 2^5681221 is an apocalyptic number.

It is an amenable number.

5681221 is a deficient number, since it is larger than the sum of its proper divisors (1374779).

5681221 is a wasteful number, since it uses less digits than its factorization.

5681221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588.

The product of its digits is 960, while the sum is 25.

The square root of 5681221 is about 2383.5312039073. The cubic root of 5681221 is about 178.4352120197.

The spelling of 5681221 in words is "five million, six hundred eighty-one thousand, two hundred twenty-one".