22471261 has 2 divisors, whose sum is σ = 22471262. Its totient is φ = 22471260.

The previous prime is 22471237. The next prime is 22471291. The reversal of 22471261 is 16217422.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21483225 + 988036 = 4635^2 + 994^2 .

It is a cyclic number.

It is not a de Polignac number, because 22471261 - 2⁷ = 22471133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22471231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11235630 + 11235631.

It is an arithmetic number, because the mean of its divisors is an integer number (11235631).

Almost surely, 2^22471261 is an apocalyptic number.

It is an amenable number.

22471261 is a deficient number, since it is larger than the sum of its proper divisors (1).

22471261 is an equidigital number, since it uses as much as digits as its factorization.

22471261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1344, while the sum is 25.

The square root of 22471261 is about 4740.3861657042. The cubic root of 22471261 is about 282.1905599660.

Adding to 22471261 its reverse (16217422), we get a palindrome (38688683).

The spelling of 22471261 in words is "twenty-two million, four hundred seventy-one thousand, two hundred sixty-one".