23170431 has 4 divisors (see below), whose sum is σ = 30893912. Its totient is φ = 15446952.

The previous prime is 23170429. The next prime is 23170471. The reversal of 23170431 is 13407132.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 23170431 - 2¹ = 23170429 is a prime.

It is a super-2 number, since 2×23170431² = 1073737745451522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23170398 and 23170407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23170471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3861736 + ... + 3861741.

It is an arithmetic number, because the mean of its divisors is an integer number (7723478).

Almost surely, 2^23170431 is an apocalyptic number.

23170431 is a deficient number, since it is larger than the sum of its proper divisors (7723481).

23170431 is an equidigital number, since it uses as much as digits as its factorization.

23170431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7723480.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 23170431 is about 4813.5673881229. The cubic root of 23170431 is about 285.0874093231.

Adding to 23170431 its reverse (13407132), we get a palindrome (36577563).

The spelling of 23170431 in words is "twenty-three million, one hundred seventy thousand, four hundred thirty-one".