143120231 has 2 divisors, whose sum is σ = 143120232. Its totient is φ = 143120230.

The previous prime is 143120221. The next prime is 143120239. The reversal of 143120231 is 132021341.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-143120231 is a prime.

It is a super-2 number, since 2×143120231² = 40966801042986722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143120239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71560115 + 71560116.

It is an arithmetic number, because the mean of its divisors is an integer number (71560116).

Almost surely, 2^143120231 is an apocalyptic number.

143120231 is a deficient number, since it is larger than the sum of its proper divisors (1).

143120231 is an equidigital number, since it uses as much as digits as its factorization.

143120231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 143120231 is about 11963.2867975319. The cubic root of 143120231 is about 523.0786684281.

Adding to 143120231 its reverse (132021341), we get a palindrome (275141572).

The spelling of 143120231 in words is "one hundred forty-three million, one hundred twenty thousand, two hundred thirty-one".