22606391 has 2 divisors, whose sum is σ = 22606392. Its totient is φ = 22606390.

The previous prime is 22606387. The next prime is 22606427. The reversal of 22606391 is 19360622.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22606391 - 2² = 22606387 is a prime.

It is a super-2 number, since 2×22606391² = 1022097828089762, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22606321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11303195 + 11303196.

It is an arithmetic number, because the mean of its divisors is an integer number (11303196).

Almost surely, 2^22606391 is an apocalyptic number.

22606391 is a deficient number, since it is larger than the sum of its proper divisors (1).

22606391 is an equidigital number, since it uses as much as digits as its factorization.

22606391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 22606391 is about 4754.6178605646. The cubic root of 22606391 is about 282.7550769997.

The spelling of 22606391 in words is "twenty-two million, six hundred six thousand, three hundred ninety-one".