22201331 has 2 divisors, whose sum is σ = 22201332. Its totient is φ = 22201330.

The previous prime is 22201307. The next prime is 22201349. The reversal of 22201331 is 13310222.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22201331 - 2¹⁰ = 22200307 is a prime.

It is a super-2 number, since 2×22201331² = 985798196343122, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (22201381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11100665 + 11100666.

It is an arithmetic number, because the mean of its divisors is an integer number (11100666).

Almost surely, 2^22201331 is an apocalyptic number.

22201331 is a deficient number, since it is larger than the sum of its proper divisors (1).

22201331 is an equidigital number, since it uses as much as digits as its factorization.

22201331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 22201331 is about 4711.8288381477. The cubic root of 22201331 is about 281.0560924483.

Adding to 22201331 its reverse (13310222), we get a palindrome (35511553).

The spelling of 22201331 in words is "twenty-two million, two hundred one thousand, three hundred thirty-one".