22616321 has 16 divisors (see below), whose sum is σ = 28030464. Its totient is φ = 17769024.

The previous prime is 22616311. The next prime is 22616333. The reversal of 22616321 is 12361622.

It is not a de Polignac number, because 22616321 - 2¹⁰ = 22615297 is a prime.

It is a super-2 number, since 2×22616321² = 1022995951150082, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22616311) 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, 13496 + ... + 15078.

It is an arithmetic number, because the mean of its divisors is an integer number (1751904).

Almost surely, 2^22616321 is an apocalyptic number.

It is an amenable number.

22616321 is a deficient number, since it is larger than the sum of its proper divisors (5414143).

22616321 is a wasteful number, since it uses less digits than its factorization.

22616321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1760.

The product of its digits is 864, while the sum is 23.

The square root of 22616321 is about 4755.6619938764. The cubic root of 22616321 is about 282.7964715904.

Adding to 22616321 its reverse (12361622), we get a palindrome (34977943).

The spelling of 22616321 in words is "twenty-two million, six hundred sixteen thousand, three hundred twenty-one".