143213081 has 12 divisors (see below), whose sum is σ = 157549392. Its totient is φ = 129105000.

The previous prime is 143213071. The next prime is 143213093. The reversal of 143213081 is 180312341.

It is a de Polignac number, because none of the positive numbers 2^k-143213081 is a prime.

It is a super-2 number, since 2×143213081² = 41019973139025122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (143213011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 250526 + ... + 251096.

It is an arithmetic number, because the mean of its divisors is an integer number (13129116).

Almost surely, 2^143213081 is an apocalyptic number.

143213081 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

143213081 is a deficient number, since it is larger than the sum of its proper divisors (14336311).

143213081 is an equidigital number, since it uses as much as digits as its factorization.

143213081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884 (or 733 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 143213081 is about 11967.1667908490. The cubic root of 143213081 is about 523.1917606512.

The spelling of 143213081 in words is "one hundred forty-three million, two hundred thirteen thousand, eighty-one".