143423881 has 4 divisors (see below), whose sum is σ = 143453700. Its totient is φ = 143394064.

The previous prime is 143423873. The next prime is 143423893. The reversal of 143423881 is 188324341.

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

It can be written as a sum of positive squares in 2 ways, for example, as 84272400 + 59151481 = 9180^2 + 7691^2 .

It is a cyclic number.

It is not a de Polignac number, because 143423881 - 2³ = 143423873 is a prime.

It is a super-2 number, since 2×143423881² = 41140819282204322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (143423831) 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, 5866 + ... + 17923.

It is an arithmetic number, because the mean of its divisors is an integer number (35863425).

Almost surely, 2^143423881 is an apocalyptic number.

It is an amenable number.

143423881 is a deficient number, since it is larger than the sum of its proper divisors (29819).

143423881 is an equidigital number, since it uses as much as digits as its factorization.

143423881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29818.

The product of its digits is 18432, while the sum is 34.

The square root of 143423881 is about 11975.9709835988. The cubic root of 143423881 is about 523.4483358048.

The spelling of 143423881 in words is "one hundred forty-three million, four hundred twenty-three thousand, eight hundred eighty-one".