15220889 has 2 divisors, whose sum is σ = 15220890. Its totient is φ = 15220888.

The previous prime is 15220883. The next prime is 15220897. The reversal of 15220889 is 98802251.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7795264 + 7425625 = 2792^2 + 2725^2 .

It is a cyclic number.

It is not a de Polignac number, because 15220889 - 2⁸ = 15220633 is a prime.

It is not a weakly prime, because it can be changed into another prime (15220883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7610444 + 7610445.

It is an arithmetic number, because the mean of its divisors is an integer number (7610445).

Almost surely, 2^15220889 is an apocalyptic number.

It is an amenable number.

15220889 is a deficient number, since it is larger than the sum of its proper divisors (1).

15220889 is an equidigital number, since it uses as much as digits as its factorization.

15220889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 15220889 is about 3901.3957758730. The cubic root of 15220889 is about 247.8258891086.

The spelling of 15220889 in words is "fifteen million, two hundred twenty thousand, eight hundred eighty-nine".