23140209 has 8 divisors (see below), whose sum is σ = 30942432. Its totient is φ = 15382400.

The previous prime is 23140199. The next prime is 23140217. The reversal of 23140209 is 90204132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23140209 - 2⁵ = 23140177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23140279) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9867 + ... + 11984.

It is an arithmetic number, because the mean of its divisors is an integer number (3867804).

Almost surely, 2^23140209 is an apocalyptic number.

It is an amenable number.

23140209 is a deficient number, since it is larger than the sum of its proper divisors (7802223).

23140209 is a wasteful number, since it uses less digits than its factorization.

23140209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22207.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 23140209 is about 4810.4271120141. The cubic root of 23140209 is about 284.9634055815.

The spelling of 23140209 in words is "twenty-three million, one hundred forty thousand, two hundred nine".