22236691 has 2 divisors, whose sum is σ = 22236692. Its totient is φ = 22236690.

The previous prime is 22236689. The next prime is 22236727. The reversal of 22236691 is 19663222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22236691 - 2¹ = 22236689 is a prime.

Together with 22236689, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (22236671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11118345 + 11118346.

It is an arithmetic number, because the mean of its divisors is an integer number (11118346).

Almost surely, 2^22236691 is an apocalyptic number.

22236691 is a deficient number, since it is larger than the sum of its proper divisors (1).

22236691 is an equidigital number, since it uses as much as digits as its factorization.

22236691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 31.

The square root of 22236691 is about 4715.5796038239. The cubic root of 22236691 is about 281.2052257284.

The spelling of 22236691 in words is "twenty-two million, two hundred thirty-six thousand, six hundred ninety-one".