22651 has 2 divisors, whose sum is σ = 22652. Its totient is φ = 22650.

The previous prime is 22643. The next prime is 22669. The reversal of 22651 is 15622.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22651 - 2³ = 22643 is a prime.

It is the 151-st Hogben number.

22651 is a lucky number.

It is a plaindrome in base 12.

It is not a weakly prime, because it can be changed into another prime (22621) by changing a digit.

It is a nontrivial repunit in base 150.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11325 + 11326.

It is an arithmetic number, because the mean of its divisors is an integer number (11326).

2²²⁶⁵¹ is an apocalyptic number.

22651 is a deficient number, since it is larger than the sum of its proper divisors (1).

22651 is an equidigital number, since it uses as much as digits as its factorization.

22651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120, while the sum is 16.

The square root of 22651 is about 150.5024916737. The cubic root of 22651 is about 28.2940940865.

The spelling of 22651 in words is "twenty-two thousand, six hundred fifty-one".