22047237 has 6 divisors (see below), whose sum is σ = 31846022. Its totient is φ = 14698152.

The previous prime is 22047229. The next prime is 22047257. The reversal of 22047237 is 73274022.

It can be written as a sum of positive squares in only one way, i.e., 21986721 + 60516 = 4689^2 + 246^2 .

It is not a de Polignac number, because 22047237 - 2³ = 22047229 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22047237.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22047257) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1224838 + ... + 1224855.

Almost surely, 2^22047237 is an apocalyptic number.

It is an amenable number.

22047237 is a deficient number, since it is larger than the sum of its proper divisors (9798785).

22047237 is a wasteful number, since it uses less digits than its factorization.

22047237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2449699 (or 2449696 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 27.

The square root of 22047237 is about 4695.4485408744. The cubic root of 22047237 is about 280.4043350551.

The spelling of 22047237 in words is "twenty-two million, forty-seven thousand, two hundred thirty-seven".