22572321 has 4 divisors (see below), whose sum is σ = 30096432. Its totient is φ = 15048212.

The previous prime is 22572317. The next prime is 22572401. The reversal of 22572321 is 12327522.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22572321 - 2² = 22572317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22572291 and 22572300.

It is not an unprimeable number, because it can be changed into a prime (22571321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3762051 + ... + 3762056.

It is an arithmetic number, because the mean of its divisors is an integer number (7524108).

Almost surely, 2^22572321 is an apocalyptic number.

It is an amenable number.

22572321 is a deficient number, since it is larger than the sum of its proper divisors (7524111).

22572321 is an equidigital number, since it uses as much as digits as its factorization.

22572321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7524110.

The product of its digits is 1680, while the sum is 24.

The square root of 22572321 is about 4751.0336770012. The cubic root of 22572321 is about 282.6129592383.

Adding to 22572321 its reverse (12327522), we get a palindrome (34899843).

The spelling of 22572321 in words is "twenty-two million, five hundred seventy-two thousand, three hundred twenty-one".