22621559 has 2 divisors, whose sum is σ = 22621560. Its totient is φ = 22621558.

The previous prime is 22621553. The next prime is 22621591. The reversal of 22621559 is 95512622.

It is an a-pointer prime, because the next prime (22621591) can be obtained adding 22621559 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22621559 is a prime.

It is a Chen prime.

It is equal to p_1425875 and since 22621559 and 1425875 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22621553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11310779 + 11310780.

It is an arithmetic number, because the mean of its divisors is an integer number (11310780).

Almost surely, 2^22621559 is an apocalyptic number.

22621559 is a deficient number, since it is larger than the sum of its proper divisors (1).

22621559 is an equidigital number, since it uses as much as digits as its factorization.

22621559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10800, while the sum is 32.

The square root of 22621559 is about 4756.2126739665. The cubic root of 22621559 is about 282.8183020431.

The spelling of 22621559 in words is "twenty-two million, six hundred twenty-one thousand, five hundred fifty-nine".