22713287 has 2 divisors, whose sum is σ = 22713288. Its totient is φ = 22713286.

The previous prime is 22713283. The next prime is 22713319. The reversal of 22713287 is 78231722.

It is an a-pointer prime, because the next prime (22713319) can be obtained adding 22713287 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22713287 - 2² = 22713283 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22713281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11356643 + 11356644.

It is an arithmetic number, because the mean of its divisors is an integer number (11356644).

Almost surely, 2^22713287 is an apocalyptic number.

22713287 is a deficient number, since it is larger than the sum of its proper divisors (1).

22713287 is an equidigital number, since it uses as much as digits as its factorization.

22713287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9408, while the sum is 32.

The square root of 22713287 is about 4765.8458850450. The cubic root of 22713287 is about 283.2000525006.

The spelling of 22713287 in words is "twenty-two million, seven hundred thirteen thousand, two hundred eighty-seven".