143161331 has 2 divisors, whose sum is σ = 143161332. Its totient is φ = 143161330.

The previous prime is 143161303. The next prime is 143161373. The reversal of 143161331 is 133161341.

It is a weak prime.

It is an emirp because it is prime and its reverse (133161341) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-143161331 is a prime.

It is a super-2 number, since 2×143161331² = 40990333387383122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 143161297 and 143161306.

It is not a weakly prime, because it can be changed into another prime (143161831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71580665 + 71580666.

It is an arithmetic number, because the mean of its divisors is an integer number (71580666).

Almost surely, 2^143161331 is an apocalyptic number.

143161331 is a deficient number, since it is larger than the sum of its proper divisors (1).

143161331 is an equidigital number, since it uses as much as digits as its factorization.

143161331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 23.

The square root of 143161331 is about 11965.0044295855. The cubic root of 143161331 is about 523.1287346685.

The spelling of 143161331 in words is "one hundred forty-three million, one hundred sixty-one thousand, three hundred thirty-one".