143344381 has 4 divisors (see below), whose sum is σ = 144087292. Its totient is φ = 142601472.

The previous prime is 143344373. The next prime is 143344387. The reversal of 143344381 is 183443341.

143344381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 44023225 + 99321156 = 6635^2 + 9966^2 .

It is a cyclic number.

It is not a de Polignac number, because 143344381 - 2³ = 143344373 is a prime.

It is a super-2 number, since 2×143344381² = 41095223128546322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143344387) 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, 371166 + ... + 371551.

It is an arithmetic number, because the mean of its divisors is an integer number (36021823).

Almost surely, 2^143344381 is an apocalyptic number.

It is an amenable number.

143344381 is a deficient number, since it is larger than the sum of its proper divisors (742911).

143344381 is an equidigital number, since it uses as much as digits as its factorization.

143344381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742910.

The product of its digits is 13824, while the sum is 31.

The square root of 143344381 is about 11972.6513772013. The cubic root of 143344381 is about 523.3516019515.

The spelling of 143344381 in words is "one hundred forty-three million, three hundred forty-four thousand, three hundred eighty-one".