23312143 has 4 divisors (see below), whose sum is σ = 24116040. Its totient is φ = 22508248.

The previous prime is 23312131. The next prime is 23312147. The reversal of 23312143 is 34121332.

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

It is a cyclic number.

It is not a de Polignac number, because 23312143 - 2¹⁷ = 23181071 is a prime.

It is a super-2 number, since 2×23312143² = 1086912022504898, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23312143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23312147) 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, 401905 + ... + 401962.

It is an arithmetic number, because the mean of its divisors is an integer number (6029010).

Almost surely, 2^23312143 is an apocalyptic number.

23312143 is a deficient number, since it is larger than the sum of its proper divisors (803897).

23312143 is an equidigital number, since it uses as much as digits as its factorization.

23312143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803896.

The product of its digits is 432, while the sum is 19.

The square root of 23312143 is about 4828.2650092968. The cubic root of 23312143 is about 285.6674333769.

Adding to 23312143 its reverse (34121332), we get a palindrome (57433475).

The spelling of 23312143 in words is "twenty-three million, three hundred twelve thousand, one hundred forty-three".