331135513 has 2 divisors, whose sum is σ = 331135514. Its totient is φ = 331135512.

The previous prime is 331135489. The next prime is 331135579. The reversal of 331135513 is 315531133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 316412944 + 14722569 = 17788^2 + 3837^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331135513 is a prime.

It is not a weakly prime, because it can be changed into another prime (331135613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165567756 + 165567757.

It is an arithmetic number, because the mean of its divisors is an integer number (165567757).

Almost surely, 2^331135513 is an apocalyptic number.

It is an amenable number.

331135513 is a deficient number, since it is larger than the sum of its proper divisors (1).

331135513 is an equidigital number, since it uses as much as digits as its factorization.

331135513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2025, while the sum is 25.

The square root of 331135513 is about 18197.1292516155. The cubic root of 331135513 is about 691.8340292989.

Adding to 331135513 its reverse (315531133), we get a palindrome (646666646).

The spelling of 331135513 in words is "three hundred thirty-one million, one hundred thirty-five thousand, five hundred thirteen".