143331013 has 4 divisors (see below), whose sum is σ = 163806880. Its totient is φ = 122855148.

The previous prime is 143330987. The next prime is 143331017. The reversal of 143331013 is 310133341.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 143331013 - 2⁵ = 143330981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143331017) 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, 10237923 + ... + 10237936.

It is an arithmetic number, because the mean of its divisors is an integer number (40951720).

Almost surely, 2^143331013 is an apocalyptic number.

It is an amenable number.

143331013 is a deficient number, since it is larger than the sum of its proper divisors (20475867).

143331013 is an equidigital number, since it uses as much as digits as its factorization.

143331013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20475866.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 143331013 is about 11972.0930918532. The cubic root of 143331013 is about 523.3353325504.

Adding to 143331013 its reverse (310133341), we get a palindrome (453464354).

The spelling of 143331013 in words is "one hundred forty-three million, three hundred thirty-one thousand, thirteen".