37222209 has 18 divisors (see below), whose sum is σ = 54403778. Its totient is φ = 24523200.

The previous prime is 37222187. The next prime is 37222217. The reversal of 37222209 is 90222273.

It can be written as a sum of positive squares in only one way, i.e., 34751025 + 2471184 = 5895^2 + 1572^2 .

It is not a de Polignac number, because 37222209 - 2¹⁶ = 37156673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (37222279) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 154329 + ... + 154569.

Almost surely, 2^37222209 is an apocalyptic number.

It is an amenable number.

37222209 is a deficient number, since it is larger than the sum of its proper divisors (17181569).

37222209 is a wasteful number, since it uses less digits than its factorization.

37222209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509 (or 375 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 37222209 is about 6101.0006556302. Note that the first 3 decimals coincide. The cubic root of 37222209 is about 333.8879259914.

The spelling of 37222209 in words is "thirty-seven million, two hundred twenty-two thousand, two hundred nine".