22065997 has 2 divisors, whose sum is σ = 22065998. Its totient is φ = 22065996.

The previous prime is 22065991. The next prime is 22066001. The reversal of 22065997 is 79956022.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22005481 + 60516 = 4691^2 + 246^2 .

It is a cyclic number.

It is not a de Polignac number, because 22065997 - 2¹¹ = 22063949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22065991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11032998 + 11032999.

It is an arithmetic number, because the mean of its divisors is an integer number (11032999).

Almost surely, 2^22065997 is an apocalyptic number.

It is an amenable number.

22065997 is a deficient number, since it is larger than the sum of its proper divisors (1).

22065997 is an equidigital number, since it uses as much as digits as its factorization.

22065997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 22065997 is about 4697.4457953232. The cubic root of 22065997 is about 280.4838445496.

The spelling of 22065997 in words is "twenty-two million, sixty-five thousand, nine hundred ninety-seven".