23143251 has 4 divisors (see below), whose sum is σ = 30857672. Its totient is φ = 15428832.

The previous prime is 23143199. The next prime is 23143259. The reversal of 23143251 is 15234132.

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

It is not a de Polignac number, because 23143251 - 2¹³ = 23135059 is a prime.

It is a super-2 number, since 2×23143251² = 1071220133698002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23143259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3857206 + ... + 3857211.

It is an arithmetic number, because the mean of its divisors is an integer number (7714418).

Almost surely, 2^23143251 is an apocalyptic number.

23143251 is a deficient number, since it is larger than the sum of its proper divisors (7714421).

23143251 is an equidigital number, since it uses as much as digits as its factorization.

23143251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7714420.

The product of its digits is 720, while the sum is 21.

The square root of 23143251 is about 4810.7432897630. The cubic root of 23143251 is about 284.9758920821.

Adding to 23143251 its reverse (15234132), we get a palindrome (38377383).

It can be divided in two parts, 2314 and 3251, that added together give a triangular number (5565 = T₁₀₅).

The spelling of 23143251 in words is "twenty-three million, one hundred forty-three thousand, two hundred fifty-one".