22051009 has 2 divisors, whose sum is σ = 22051010. Its totient is φ = 22051008.

The previous prime is 22050979. The next prime is 22051019. The reversal of 22051009 is 90015022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15186609 + 6864400 = 3897^2 + 2620^2 .

It is a cyclic number.

It is not a de Polignac number, because 22051009 - 2²³ = 13662401 is a prime.

It is not a weakly prime, because it can be changed into another prime (22051019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11025504 + 11025505.

It is an arithmetic number, because the mean of its divisors is an integer number (11025505).

Almost surely, 2^22051009 is an apocalyptic number.

It is an amenable number.

22051009 is a deficient number, since it is larger than the sum of its proper divisors (1).

22051009 is an equidigital number, since it uses as much as digits as its factorization.

22051009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 22051009 is about 4695.8501892629. The cubic root of 22051009 is about 280.4203253405.

The spelling of 22051009 in words is "twenty-two million, fifty-one thousand, nine".