143320013 has 12 divisors (see below), whose sum is σ = 152683380. Its totient is φ = 134502912.

The previous prime is 143319977. The next prime is 143320019. The reversal of 143320013 is 310023341.

It is a happy number.

143320013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 3087049 + 140232964 = 1757^2 + 11842^2 .

It is not a de Polignac number, because 143320013 - 2⁶ = 143319949 is a prime.

It is a super-2 number, since 2×143320013² = 41081252252640338, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 143319973 and 143320000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143320019) 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, 176753 + ... + 177561.

It is an arithmetic number, because the mean of its divisors is an integer number (12723615).

Almost surely, 2^143320013 is an apocalyptic number.

It is an amenable number.

143320013 is a deficient number, since it is larger than the sum of its proper divisors (9363367).

143320013 is an equidigital number, since it uses as much as digits as its factorization.

143320013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1456 (or 1439 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 143320013 is about 11971.6336813319. The cubic root of 143320013 is about 523.3219443431.

Adding to 143320013 its reverse (310023341), we get a palindrome (453343354).

The spelling of 143320013 in words is "one hundred forty-three million, three hundred twenty thousand, thirteen".