22306891 has 2 divisors, whose sum is σ = 22306892. Its totient is φ = 22306890.

The previous prime is 22306883. The next prime is 22306919. The reversal of 22306891 is 19860322.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22306891 - 2³ = 22306883 is a prime.

It is not a weakly prime, because it can be changed into another prime (22300891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11153445 + 11153446.

It is an arithmetic number, because the mean of its divisors is an integer number (11153446).

Almost surely, 2^22306891 is an apocalyptic number.

22306891 is a deficient number, since it is larger than the sum of its proper divisors (1).

22306891 is an equidigital number, since it uses as much as digits as its factorization.

22306891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 22306891 is about 4723.0171500853. The cubic root of 22306891 is about 281.5008313091.

The spelling of 22306891 in words is "twenty-two million, three hundred six thousand, eight hundred ninety-one".