22409537 has 2 divisors, whose sum is σ = 22409538. Its totient is φ = 22409536.

The previous prime is 22409479. The next prime is 22409539. The reversal of 22409537 is 73590422.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15178816 + 7230721 = 3896^2 + 2689^2 .

It is a cyclic number.

It is not a de Polignac number, because 22409537 - 2⁶ = 22409473 is a prime.

Together with 22409539, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22409539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11204768 + 11204769.

It is an arithmetic number, because the mean of its divisors is an integer number (11204769).

Almost surely, 2^22409537 is an apocalyptic number.

It is an amenable number.

22409537 is a deficient number, since it is larger than the sum of its proper divisors (1).

22409537 is an equidigital number, since it uses as much as digits as its factorization.

22409537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 22409537 is about 4733.8712487773. The cubic root of 22409537 is about 281.9319496111.

Adding to 22409537 its reverse (73590422), we get a palindrome (95999959).

The spelling of 22409537 in words is "twenty-two million, four hundred nine thousand, five hundred thirty-seven".