22542321 has 8 divisors (see below), whose sum is σ = 30091104. Its totient is φ = 15010880.

The previous prime is 22542313. The next prime is 22542329. The reversal of 22542321 is 12324522.

It is an interprime number because it is at equal distance from previous prime (22542313) and next prime (22542329).

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 22542321 - 2³ = 22542313 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22542329) 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, 915 + ... + 6776.

It is an arithmetic number, because the mean of its divisors is an integer number (3761388).

Almost surely, 2^22542321 is an apocalyptic number.

It is an amenable number.

22542321 is a deficient number, since it is larger than the sum of its proper divisors (7548783).

22542321 is an equidigital number, since it uses as much as digits as its factorization.

22542321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8671.

The product of its digits is 960, while the sum is 21.

The square root of 22542321 is about 4747.8754195956. The cubic root of 22542321 is about 282.4877004069.

Adding to 22542321 its reverse (12324522), we get a palindrome (34866843).

The spelling of 22542321 in words is "twenty-two million, five hundred forty-two thousand, three hundred twenty-one".