73143131 has 2 divisors, whose sum is σ = 73143132. Its totient is φ = 73143130.

The previous prime is 73143121. The next prime is 73143173. The reversal of 73143131 is 13134137.

It is a weak prime.

It is an emirp because it is prime and its reverse (13134137) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73143131 - 2¹⁴ = 73126747 is a prime.

It is a super-2 number, since 2×73143131² = 10699835224966322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 73143097 and 73143106.

It is not a weakly prime, because it can be changed into another prime (73143121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36571565 + 36571566.

It is an arithmetic number, because the mean of its divisors is an integer number (36571566).

Almost surely, 2^73143131 is an apocalyptic number.

73143131 is a deficient number, since it is larger than the sum of its proper divisors (1).

73143131 is an equidigital number, since it uses as much as digits as its factorization.

73143131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 756, while the sum is 23.

The square root of 73143131 is about 8552.3757518014. The cubic root of 73143131 is about 418.2068888003.

Adding to 73143131 its reverse (13134137), we get a palindrome (86277268).

The spelling of 73143131 in words is "seventy-three million, one hundred forty-three thousand, one hundred thirty-one".