22645009 has 2 divisors, whose sum is σ = 22645010. Its totient is φ = 22645008.

The previous prime is 22644943. The next prime is 22645019. The reversal of 22645009 is 90054622.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19140625 + 3504384 = 4375^2 + 1872^2 .

It is a cyclic number.

It is not a de Polignac number, because 22645009 - 2¹⁵ = 22612241 is a prime.

It is a super-2 number, since 2×22645009² = 1025592865220162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22645019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11322504 + 11322505.

It is an arithmetic number, because the mean of its divisors is an integer number (11322505).

Almost surely, 2^22645009 is an apocalyptic number.

It is an amenable number.

22645009 is a deficient number, since it is larger than the sum of its proper divisors (1).

22645009 is an equidigital number, since it uses as much as digits as its factorization.

22645009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 22645009 is about 4758.6772321728. The cubic root of 22645009 is about 282.9159934952.

The spelling of 22645009 in words is "twenty-two million, six hundred forty-five thousand, nine".