231445143 has 24 divisors (see below), whose sum is σ = 346666320. Its totient is φ = 148619520.

The previous prime is 231445139. The next prime is 231445153. The reversal of 231445143 is 341544132.

It is a happy number.

231445143 is a `hidden beast` number, since 2 + 3 + 144 + 514 + 3 = 666.

It is not a de Polignac number, because 231445143 - 2² = 231445139 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231445153) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 148255 + ... + 149807.

It is an arithmetic number, because the mean of its divisors is an integer number (14444430).

Almost surely, 2^231445143 is an apocalyptic number.

231445143 is a deficient number, since it is larger than the sum of its proper divisors (115221177).

231445143 is a wasteful number, since it uses less digits than its factorization.

231445143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2159 (or 2156 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 231445143 is about 15213.3212350229. The cubic root of 231445143 is about 613.9731187855.

Adding to 231445143 its reverse (341544132), we get a palindrome (572989275).

The spelling of 231445143 in words is "two hundred thirty-one million, four hundred forty-five thousand, one hundred forty-three".