40222209 has 4 divisors (see below), whose sum is σ = 53629616. Its totient is φ = 26814804.

The previous prime is 40222207. The next prime is 40222223. The reversal of 40222209 is 90222204.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 40222209 - 2¹ = 40222207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40222201) 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, 6703699 + ... + 6703704.

It is an arithmetic number, because the mean of its divisors is an integer number (13407404).

Almost surely, 2^40222209 is an apocalyptic number.

It is an amenable number.

40222209 is a deficient number, since it is larger than the sum of its proper divisors (13407407).

40222209 is a wasteful number, since it uses less digits than its factorization.

40222209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13407406.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 40222209 is about 6342.0981543965. The cubic root of 40222209 is about 342.6273069996.

The spelling of 40222209 in words is "forty million, two hundred twenty-two thousand, two hundred nine".