22591009 has 15 divisors (see below), whose sum is σ = 26629107. Its totient is φ = 19164096.

The previous prime is 22590983. The next prime is 22591021. The reversal of 22591009 is 90019522.

22591009 = 1³ + 2³ + ... + 97³.

The square root of 22591009 is 4753.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 10144225 + 12446784 = 3185^2 + 3528^2 .

It is not a de Polignac number, because 22591009 - 2¹¹ = 22588961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22591069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 232849 + ... + 232945.

Almost surely, 2^22591009 is an apocalyptic number.

22591009 is the 4753-rd square number.

22591009 is the 2377-th centered octagonal number.

It is an amenable number.

22591009 is a deficient number, since it is larger than the sum of its proper divisors (4038098).

22591009 is an frugal number, since it uses more digits than its factorization.

22591009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222 (or 104 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 28.

The cubic root of 22591009 is about 282.6909310474.

The spelling of 22591009 in words is "twenty-two million, five hundred ninety-one thousand, nine".