22661329 has 2 divisors, whose sum is σ = 22661330. Its totient is φ = 22661328.

The previous prime is 22661321. The next prime is 22661333. The reversal of 22661329 is 92316622.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16386304 + 6275025 = 4048^2 + 2505^2 .

It is a cyclic number.

It is not a de Polignac number, because 22661329 - 2³ = 22661321 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22661329.

It is not a weakly prime, because it can be changed into another prime (22661321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11330664 + 11330665.

It is an arithmetic number, because the mean of its divisors is an integer number (11330665).

Almost surely, 2^22661329 is an apocalyptic number.

It is an amenable number.

22661329 is a deficient number, since it is larger than the sum of its proper divisors (1).

22661329 is an equidigital number, since it uses as much as digits as its factorization.

22661329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 31.

The square root of 22661329 is about 4760.3916855654. The cubic root of 22661329 is about 282.9839419524.

The spelling of 22661329 in words is "twenty-two million, six hundred sixty-one thousand, three hundred twenty-nine".