231503143 has 4 divisors (see below), whose sum is σ = 239486040. Its totient is φ = 223520248.

The previous prime is 231503137. The next prime is 231503149. The reversal of 231503143 is 341305132.

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

It is an interprime number because it is at equal distance from previous prime (231503137) and next prime (231503149).

It is a cyclic number.

It is not a de Polignac number, because 231503143 - 2¹³ = 231494951 is a prime.

It is a super-3 number, since 3×231503143³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231503149) 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, 3991405 + ... + 3991462.

It is an arithmetic number, because the mean of its divisors is an integer number (59871510).

Almost surely, 2^231503143 is an apocalyptic number.

231503143 is a deficient number, since it is larger than the sum of its proper divisors (7982897).

231503143 is an equidigital number, since it uses as much as digits as its factorization.

231503143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7982896.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 231503143 is about 15215.2273397409. The cubic root of 231503143 is about 614.0244015880.

Adding to 231503143 its reverse (341305132), we get a palindrome (572808275).

The spelling of 231503143 in words is "two hundred thirty-one million, five hundred three thousand, one hundred forty-three".