231430143 has 8 divisors (see below), whose sum is σ = 352655488. Its totient is φ = 132245784.

The previous prime is 231430141. The next prime is 231430169. The reversal of 231430143 is 341034132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 231430143 - 2¹ = 231430141 is a prime.

It is a super-2 number, since 2×231430143² = 107119822178000898, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 11020483 = 231430143 / (2 + 3 + 1 + 4 + 3 + 0 + 1 + 4 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231430141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5510221 + ... + 5510262.

It is an arithmetic number, because the mean of its divisors is an integer number (44081936).

Almost surely, 2^231430143 is an apocalyptic number.

231430143 is a deficient number, since it is larger than the sum of its proper divisors (121225345).

231430143 is a wasteful number, since it uses less digits than its factorization.

231430143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11020493.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 231430143 is about 15212.8282380365. The cubic root of 231430143 is about 613.9598545974.

Adding to 231430143 its reverse (341034132), we get a palindrome (572464275).

The spelling of 231430143 in words is "two hundred thirty-one million, four hundred thirty thousand, one hundred forty-three".