22196521 has 2 divisors, whose sum is σ = 22196522. Its totient is φ = 22196520.

The previous prime is 22196519. The next prime is 22196563. The reversal of 22196521 is 12569122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14356521 + 7840000 = 3789^2 + 2800^2 .

It is a cyclic number.

It is not a de Polignac number, because 22196521 - 2¹ = 22196519 is a prime.

Together with 22196519, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 22196521.

It is not a weakly prime, because it can be changed into another prime (22196501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11098260 + 11098261.

It is an arithmetic number, because the mean of its divisors is an integer number (11098261).

Almost surely, 2^22196521 is an apocalyptic number.

It is an amenable number.

22196521 is a deficient number, since it is larger than the sum of its proper divisors (1).

22196521 is an equidigital number, since it uses as much as digits as its factorization.

22196521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 28.

The square root of 22196521 is about 4711.3183929766. The cubic root of 22196521 is about 281.0357937037.

The spelling of 22196521 in words is "twenty-two million, one hundred ninety-six thousand, five hundred twenty-one".