22132261 has 2 divisors, whose sum is σ = 22132262. Its totient is φ = 22132260.

The previous prime is 22132259. The next prime is 22132267. The reversal of 22132261 is 16223122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21996100 + 136161 = 4690^2 + 369^2 .

It is a cyclic number.

It is not a de Polignac number, because 22132261 - 2¹ = 22132259 is a prime.

Together with 22132259, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22132267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11066130 + 11066131.

It is an arithmetic number, because the mean of its divisors is an integer number (11066131).

Almost surely, 2^22132261 is an apocalyptic number.

It is an amenable number.

22132261 is a deficient number, since it is larger than the sum of its proper divisors (1).

22132261 is an equidigital number, since it uses as much as digits as its factorization.

22132261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 19.

The square root of 22132261 is about 4704.4937028335. The cubic root of 22132261 is about 280.7643275017.

Adding to 22132261 its reverse (16223122), we get a palindrome (38355383).

The spelling of 22132261 in words is "twenty-two million, one hundred thirty-two thousand, two hundred sixty-one".