143312013 has 12 divisors (see below), whose sum is σ = 222929980. Its totient is φ = 88191936.

The previous prime is 143311981. The next prime is 143312047. The reversal of 143312013 is 310213341.

It can be written as a sum of positive squares in 2 ways, for example, as 48483369 + 94828644 = 6963^2 + 9738^2 .

It is not a de Polignac number, because 143312013 - 2⁵ = 143311981 is a prime.

It is a super-2 number, since 2×143312013² = 41076666140224338, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143312413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 612328 + ... + 612561.

Almost surely, 2^143312013 is an apocalyptic number.

143312013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

143312013 is a deficient number, since it is larger than the sum of its proper divisors (79617967).

143312013 is a wasteful number, since it uses less digits than its factorization.

143312013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1224908 (or 1224905 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 143312013 is about 11971.2995535155. The cubic root of 143312013 is about 523.3122070348.

Adding to 143312013 its reverse (310213341), we get a palindrome (453525354).

The spelling of 143312013 in words is "one hundred forty-three million, three hundred twelve thousand, thirteen".