22531489 has 2 divisors, whose sum is σ = 22531490. Its totient is φ = 22531488.

The previous prime is 22531433. The next prime is 22531493. The reversal of 22531489 is 98413522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18662400 + 3869089 = 4320^2 + 1967^2 .

It is a cyclic number.

It is not a de Polignac number, because 22531489 - 2¹³ = 22523297 is a prime.

It is not a weakly prime, because it can be changed into another prime (22531589) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11265744 + 11265745.

It is an arithmetic number, because the mean of its divisors is an integer number (11265745).

Almost surely, 2^22531489 is an apocalyptic number.

It is an amenable number.

22531489 is a deficient number, since it is larger than the sum of its proper divisors (1).

22531489 is an equidigital number, since it uses as much as digits as its factorization.

22531489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 34.

The square root of 22531489 is about 4746.7345617803. The cubic root of 22531489 is about 282.4424463118.

The spelling of 22531489 in words is "twenty-two million, five hundred thirty-one thousand, four hundred eighty-nine".