23522009 has 12 divisors (see below), whose sum is σ = 27476964. Its totient is φ = 20077344.

The previous prime is 23522003. The next prime is 23522011. The reversal of 23522009 is 90022532.

It can be written as a sum of positive squares in 2 ways, for example, as 7038409 + 16483600 = 2653^2 + 4060^2 .

It is a de Polignac number, because none of the positive numbers 2^k-23522009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23522003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12707 + ... + 14439.

It is an arithmetic number, because the mean of its divisors is an integer number (2289747).

Almost surely, 2^23522009 is an apocalyptic number.

It is an amenable number.

23522009 is a deficient number, since it is larger than the sum of its proper divisors (3954955).

23522009 is a wasteful number, since it uses less digits than its factorization.

23522009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2024 (or 2017 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 23522009 is about 4849.9493811791. The cubic root of 23522009 is about 286.5221077229.

The spelling of 23522009 in words is "twenty-three million, five hundred twenty-two thousand, nine".