22651589 has 2 divisors, whose sum is σ = 22651590. Its totient is φ = 22651588.

The previous prime is 22651567. The next prime is 22651609. The reversal of 22651589 is 98515622.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21252100 + 1399489 = 4610^2 + 1183^2 .

It is a cyclic number.

It is not a de Polignac number, because 22651589 - 2⁸ = 22651333 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 (22651549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11325794 + 11325795.

It is an arithmetic number, because the mean of its divisors is an integer number (11325795).

Almost surely, 2^22651589 is an apocalyptic number.

It is an amenable number.

22651589 is a deficient number, since it is larger than the sum of its proper divisors (1).

22651589 is an equidigital number, since it uses as much as digits as its factorization.

22651589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43200, while the sum is 38.

The square root of 22651589 is about 4759.3685505537. The cubic root of 22651589 is about 282.9433933071.

It can be divided in two parts, 226 and 51589, that added together give a palindrome (51815).

The spelling of 22651589 in words is "twenty-two million, six hundred fifty-one thousand, five hundred eighty-nine".