22987229 has 2 divisors, whose sum is σ = 22987230. Its totient is φ = 22987228.

The previous prime is 22987219. The next prime is 22987243. The reversal of 22987229 is 92278922.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20340100 + 2647129 = 4510^2 + 1627^2 .

It is a cyclic number.

It is not a de Polignac number, because 22987229 - 2¹⁶ = 22921693 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22987219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11493614 + 11493615.

It is an arithmetic number, because the mean of its divisors is an integer number (11493615).

Almost surely, 2^22987229 is an apocalyptic number.

It is an amenable number.

22987229 is a deficient number, since it is larger than the sum of its proper divisors (1).

22987229 is an equidigital number, since it uses as much as digits as its factorization.

22987229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 41.

The square root of 22987229 is about 4794.4998696423. The cubic root of 22987229 is about 284.3340519715.

The spelling of 22987229 in words is "twenty-two million, nine hundred eighty-seven thousand, two hundred twenty-nine".