22221597 has 8 divisors (see below), whose sum is σ = 29795040. Its totient is φ = 14731280.

The previous prime is 22221593. The next prime is 22221599. The reversal of 22221597 is 79512222.

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 22221597 - 2² = 22221593 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221593) 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, 20154 + ... + 21227.

It is an arithmetic number, because the mean of its divisors is an integer number (3724380).

Almost surely, 2^22221597 is an apocalyptic number.

It is an amenable number.

22221597 is a deficient number, since it is larger than the sum of its proper divisors (7573443).

22221597 is a wasteful number, since it uses less digits than its factorization.

22221597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41563.

The product of its digits is 5040, while the sum is 30.

The square root of 22221597 is about 4713.9788926129. The cubic root of 22221597 is about 281.1415850783.

The spelling of 22221597 in words is "twenty-two million, two hundred twenty-one thousand, five hundred ninety-seven".