22241509 has 4 divisors (see below), whose sum is σ = 22260204. Its totient is φ = 22222816.

The previous prime is 22241507. The next prime is 22241519. The reversal of 22241509 is 90514222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18301284 + 3940225 = 4278^2 + 1985^2 .

It is a cyclic number.

It is not a de Polignac number, because 22241509 - 2¹ = 22241507 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22241501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7432 + ... + 9985.

It is an arithmetic number, because the mean of its divisors is an integer number (5565051).

Almost surely, 2^22241509 is an apocalyptic number.

It is an amenable number.

22241509 is a deficient number, since it is larger than the sum of its proper divisors (18695).

22241509 is a wasteful number, since it uses less digits than its factorization.

22241509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18694.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 22241509 is about 4716.0904359437. The cubic root of 22241509 is about 281.2255337400.

The spelling of 22241509 in words is "twenty-two million, two hundred forty-one thousand, five hundred nine".