231142043 has 4 divisors (see below), whose sum is σ = 252154968. Its totient is φ = 210129120.

The previous prime is 231142039. The next prime is 231142091. The reversal of 231142043 is 340241132.

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 231142043 - 2² = 231142039 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231142003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10506446 + ... + 10506467.

It is an arithmetic number, because the mean of its divisors is an integer number (63038742).

Almost surely, 2^231142043 is an apocalyptic number.

231142043 is a deficient number, since it is larger than the sum of its proper divisors (21012925).

231142043 is a wasteful number, since it uses less digits than its factorization.

231142043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21012924.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 231142043 is about 15203.3563070790. The cubic root of 231142043 is about 613.7049824636.

Adding to 231142043 its reverse (340241132), we get a palindrome (571383175).

The spelling of 231142043 in words is "two hundred thirty-one million, one hundred forty-two thousand, forty-three".