143321313 has 16 divisors (see below), whose sum is σ = 206592320. Its totient is φ = 88070976.

The previous prime is 143321309. The next prime is 143321327. The reversal of 143321313 is 313123341.

It is not a de Polignac number, because 143321313 - 2² = 143321309 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 143321313.

It is not an unprimeable number, because it can be changed into a prime (143321813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31870 + ... + 36087.

It is an arithmetic number, because the mean of its divisors is an integer number (12912020).

Almost surely, 2^143321313 is an apocalyptic number.

It is an amenable number.

143321313 is a deficient number, since it is larger than the sum of its proper divisors (63271007).

143321313 is a wasteful number, since it uses less digits than its factorization.

143321313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68016.

The product of its digits is 648, while the sum is 21.

The square root of 143321313 is about 11971.6879762212. The cubic root of 143321313 is about 523.3235266215.

Adding to 143321313 its reverse (313123341), we get a palindrome (456444654).

The spelling of 143321313 in words is "one hundred forty-three million, three hundred twenty-one thousand, three hundred thirteen".