22471237 has 2 divisors, whose sum is σ = 22471238. Its totient is φ = 22471236.

The previous prime is 22471231. The next prime is 22471261. The reversal of 22471237 is 73217422.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22335076 + 136161 = 4726^2 + 369^2 .

It is a cyclic number.

It is not a de Polignac number, because 22471237 - 2⁷ = 22471109 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, 11235618 + 11235619.

It is an arithmetic number, because the mean of its divisors is an integer number (11235619).

Almost surely, 2^22471237 is an apocalyptic number.

It is an amenable number.

22471237 is a deficient number, since it is larger than the sum of its proper divisors (1).

22471237 is an equidigital number, since it uses as much as digits as its factorization.

22471237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4704, while the sum is 28.

The square root of 22471237 is about 4740.3836342642. The cubic root of 22471237 is about 282.1904595032.

Adding to 22471237 its reverse (73217422), we get a palindrome (95688659).

The spelling of 22471237 in words is "twenty-two million, four hundred seventy-one thousand, two hundred thirty-seven".