331131113 has 2 divisors, whose sum is σ = 331131114. Its totient is φ = 331131112.

The previous prime is 331131109. The next prime is 331131137. The reversal of 331131113 is 311131133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 329894569 + 1236544 = 18163^2 + 1112^2 .

It is a cyclic number.

It is not a de Polignac number, because 331131113 - 2² = 331131109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 331131091 and 331131100.

It is not a weakly prime, because it can be changed into another prime (331131173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165565556 + 165565557.

It is an arithmetic number, because the mean of its divisors is an integer number (165565557).

Almost surely, 2^331131113 is an apocalyptic number.

It is an amenable number.

331131113 is a deficient number, since it is larger than the sum of its proper divisors (1).

331131113 is an equidigital number, since it uses as much as digits as its factorization.

331131113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81, while the sum is 17.

The square root of 331131113 is about 18197.0083530233. The cubic root of 331131113 is about 691.8309650114.

Adding to 331131113 its reverse (311131133), we get a palindrome (642262246).

The spelling of 331131113 in words is "three hundred thirty-one million, one hundred thirty-one thousand, one hundred thirteen".