22112509 has 2 divisors, whose sum is σ = 22112510. Its totient is φ = 22112508.

The previous prime is 22112507. The next prime is 22112521. The reversal of 22112509 is 90521122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21132409 + 980100 = 4597^2 + 990^2 .

It is a cyclic number.

It is not a de Polignac number, because 22112509 - 2¹ = 22112507 is a prime.

Together with 22112507, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 22112509.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22112507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11056254 + 11056255.

It is an arithmetic number, because the mean of its divisors is an integer number (11056255).

Almost surely, 2^22112509 is an apocalyptic number.

It is an amenable number.

22112509 is a deficient number, since it is larger than the sum of its proper divisors (1).

22112509 is an equidigital number, since it uses as much as digits as its factorization.

22112509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 22112509 is about 4702.3939647801. The cubic root of 22112509 is about 280.6807796653.

The spelling of 22112509 in words is "twenty-two million, one hundred twelve thousand, five hundred nine".