142331513 has 2 divisors, whose sum is σ = 142331514. Its totient is φ = 142331512.

The previous prime is 142331473. The next prime is 142331533. The reversal of 142331513 is 315133241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138956944 + 3374569 = 11788^2 + 1837^2 .

It is an emirp because it is prime and its reverse (315133241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142331513 - 2⁸ = 142331257 is a prime.

It is not a weakly prime, because it can be changed into another prime (142331533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71165756 + 71165757.

It is an arithmetic number, because the mean of its divisors is an integer number (71165757).

Almost surely, 2^142331513 is an apocalyptic number.

It is an amenable number.

142331513 is a deficient number, since it is larger than the sum of its proper divisors (1).

142331513 is an equidigital number, since it uses as much as digits as its factorization.

142331513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 23.

The square root of 142331513 is about 11930.2771552047. The cubic root of 142331513 is about 522.1160238371.

Adding to 142331513 its reverse (315133241), we get a palindrome (457464754).

The spelling of 142331513 in words is "one hundred forty-two million, three hundred thirty-one thousand, five hundred thirteen".