23542209 has 12 divisors (see below), whose sum is σ = 34057296. Its totient is φ = 15670872.

The previous prime is 23542193. The next prime is 23542219. The reversal of 23542209 is 90224532.

23542209 is a `hidden beast` number, since 235 + 422 + 0 + 9 = 666.

It is not a de Polignac number, because 23542209 - 2⁴ = 23542193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23542219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5862 + ... + 9024.

It is an arithmetic number, because the mean of its divisors is an integer number (2838108).

Almost surely, 2^23542209 is an apocalyptic number.

It is an amenable number.

23542209 is a deficient number, since it is larger than the sum of its proper divisors (10515087).

23542209 is a wasteful number, since it uses less digits than its factorization.

23542209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3996 (or 3993 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 23542209 is about 4852.0314302362. The cubic root of 23542209 is about 286.6041031367.

The spelling of 23542209 in words is "twenty-three million, five hundred forty-two thousand, two hundred nine".