22286521 has 2 divisors, whose sum is σ = 22286522. Its totient is φ = 22286520.

The previous prime is 22286503. The next prime is 22286527. The reversal of 22286521 is 12568222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18826921 + 3459600 = 4339^2 + 1860^2 .

It is a cyclic number.

It is not a de Polignac number, because 22286521 - 2¹⁹ = 21762233 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22286521.

It is not a weakly prime, because it can be changed into another prime (22286527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11143260 + 11143261.

It is an arithmetic number, because the mean of its divisors is an integer number (11143261).

Almost surely, 2^22286521 is an apocalyptic number.

It is an amenable number.

22286521 is a deficient number, since it is larger than the sum of its proper divisors (1).

22286521 is an equidigital number, since it uses as much as digits as its factorization.

22286521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3840, while the sum is 28.

The square root of 22286521 is about 4720.8601970404. The cubic root of 22286521 is about 281.4151191071.

The spelling of 22286521 in words is "twenty-two million, two hundred eighty-six thousand, five hundred twenty-one".