23140247 has 8 divisors (see below), whose sum is σ = 26386416. Its totient is φ = 20103552.

The previous prime is 23140241. The next prime is 23140279. The reversal of 23140247 is 74204132.

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 23140247 - 2¹⁰ = 23139223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23140241) 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 7 ways as a sum of consecutive naturals, for example, 52133 + ... + 52574.

It is an arithmetic number, because the mean of its divisors is an integer number (3298302).

Almost surely, 2^23140247 is an apocalyptic number.

23140247 is a deficient number, since it is larger than the sum of its proper divisors (3246169).

23140247 is a wasteful number, since it uses less digits than its factorization.

23140247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104737.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 23140247 is about 4810.4310617657. The cubic root of 23140247 is about 284.9635615669.

Adding to 23140247 its reverse (74204132), we get a palindrome (97344379).

The spelling of 23140247 in words is "twenty-three million, one hundred forty thousand, two hundred forty-seven".