22201237 has 2 divisors, whose sum is σ = 22201238. Its totient is φ = 22201236.

The previous prime is 22201217. The next prime is 22201243. The reversal of 22201237 is 73210222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20666116 + 1535121 = 4546^2 + 1239^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22201237 is a prime.

It is equal to p_1401076 and since 22201237 and 1401076 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22201217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11100618 + 11100619.

It is an arithmetic number, because the mean of its divisors is an integer number (11100619).

Almost surely, 2^22201237 is an apocalyptic number.

It is an amenable number.

22201237 is a deficient number, since it is larger than the sum of its proper divisors (1).

22201237 is an equidigital number, since it uses as much as digits as its factorization.

22201237 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 22201237 is about 4711.8188632417. The cubic root of 22201237 is about 281.0556957858.

Adding to 22201237 its reverse (73210222), we get a palindrome (95411459).

The spelling of 22201237 in words is "twenty-two million, two hundred one thousand, two hundred thirty-seven".