23213143 has 8 divisors (see below), whose sum is σ = 24760512. Its totient is φ = 21686016.

The previous prime is 23213131. The next prime is 23213147. The reversal of 23213143 is 34131232.

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

It is a de Polignac number, because none of the positive numbers 2^k-23213143 is a prime.

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 23213143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23213147) 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, 2655 + ... + 7312.

It is an arithmetic number, because the mean of its divisors is an integer number (3095064).

Almost surely, 2^23213143 is an apocalyptic number.

23213143 is a deficient number, since it is larger than the sum of its proper divisors (1547369).

23213143 is a wasteful number, since it uses less digits than its factorization.

23213143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10121.

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

The square root of 23213143 is about 4818.0019717721. The cubic root of 23213143 is about 285.2624769772.

Subtracting from 23213143 its sum of digits (19), we obtain a square (23213124 = 4818²).

Adding to 23213143 its reverse (34131232), we get a palindrome (57344375).

The spelling of 23213143 in words is "twenty-three million, two hundred thirteen thousand, one hundred forty-three".