231422143 has 4 divisors (see below), whose sum is σ = 232257880. Its totient is φ = 230586408.

The previous prime is 231422129. The next prime is 231422167. The reversal of 231422143 is 341224132.

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 231422143 - 2¹³ = 231413951 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 (231422123) 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, 417453 + ... + 418006.

It is an arithmetic number, because the mean of its divisors is an integer number (58064470).

Almost surely, 2^231422143 is an apocalyptic number.

231422143 is a deficient number, since it is larger than the sum of its proper divisors (835737).

231422143 is an equidigital number, since it uses as much as digits as its factorization.

231422143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 835736.

The product of its digits is 1152, while the sum is 22.

The square root of 231422143 is about 15212.5652997777. The cubic root of 231422143 is about 613.9527801294.

Adding to 231422143 its reverse (341224132), we get a palindrome (572646275).

The spelling of 231422143 in words is "two hundred thirty-one million, four hundred twenty-two thousand, one hundred forty-three".