22751009 has 2 divisors, whose sum is σ = 22751010. Its totient is φ = 22751008.

The previous prime is 22750963. The next prime is 22751011. The reversal of 22751009 is 90015722.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22591009 + 160000 = 4753^2 + 400^2 .

It is a cyclic number.

It is not a de Polignac number, because 22751009 - 2⁸ = 22750753 is a prime.

It is a Sophie Germain prime.

Together with 22751011, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (22751039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11375504 + 11375505.

It is an arithmetic number, because the mean of its divisors is an integer number (11375505).

Almost surely, 2^22751009 is an apocalyptic number.

It is an amenable number.

22751009 is a deficient number, since it is larger than the sum of its proper divisors (1).

22751009 is an equidigital number, since it uses as much as digits as its factorization.

22751009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 22751009 is about 4769.8017778520. The cubic root of 22751009 is about 283.3567443939.

The spelling of 22751009 in words is "twenty-two million, seven hundred fifty-one thousand, nine".