22209131 has 4 divisors (see below), whose sum is σ = 25381872. Its totient is φ = 19036392.

The previous prime is 22209127. The next prime is 22209137. The reversal of 22209131 is 13190222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13190222 = 2 ⋅6595111.

It is a cyclic number.

It is not a de Polignac number, because 22209131 - 2² = 22209127 is a prime.

It is a super-2 number, since 2×22209131² = 986490999550322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22209137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1586360 + ... + 1586373.

It is an arithmetic number, because the mean of its divisors is an integer number (6345468).

Almost surely, 2^22209131 is an apocalyptic number.

22209131 is a deficient number, since it is larger than the sum of its proper divisors (3172741).

22209131 is an equidigital number, since it uses as much as digits as its factorization.

22209131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3172740.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 22209131 is about 4712.6564695509. The cubic root of 22209131 is about 281.0890031004.

Adding to 22209131 its reverse (13190222), we get a palindrome (35399353).

The spelling of 22209131 in words is "twenty-two million, two hundred nine thousand, one hundred thirty-one".