22406537 has 2 divisors, whose sum is σ = 22406538. Its totient is φ = 22406536.

The previous prime is 22406513. The next prime is 22406539. The reversal of 22406537 is 73560422.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15832441 + 6574096 = 3979^2 + 2564^2 .

It is a cyclic number.

It is not a de Polignac number, because 22406537 - 2⁸ = 22406281 is a prime.

Together with 22406539, 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 (22406539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11203268 + 11203269.

It is an arithmetic number, because the mean of its divisors is an integer number (11203269).

Almost surely, 2^22406537 is an apocalyptic number.

It is an amenable number.

22406537 is a deficient number, since it is larger than the sum of its proper divisors (1).

22406537 is an equidigital number, since it uses as much as digits as its factorization.

22406537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 29.

The square root of 22406537 is about 4733.5543727732. The cubic root of 22406537 is about 281.9193681583.

Adding to 22406537 its reverse (73560422), we get a palindrome (95966959).

The spelling of 22406537 in words is "twenty-two million, four hundred six thousand, five hundred thirty-seven".