22740191 has 2 divisors, whose sum is σ = 22740192. Its totient is φ = 22740190.

The previous prime is 22740173. The next prime is 22740197. The reversal of 22740191 is 19104722.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22740191 - 2¹⁴ = 22723807 is a prime.

It is equal to p_1432907 and since 22740191 and 1432907 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22740191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22740197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11370095 + 11370096.

It is an arithmetic number, because the mean of its divisors is an integer number (11370096).

Almost surely, 2^22740191 is an apocalyptic number.

22740191 is a deficient number, since it is larger than the sum of its proper divisors (1).

22740191 is an equidigital number, since it uses as much as digits as its factorization.

22740191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 22740191 is about 4768.6676336268. The cubic root of 22740191 is about 283.3118256646.

The spelling of 22740191 in words is "twenty-two million, seven hundred forty thousand, one hundred ninety-one".