331432613 has 2 divisors, whose sum is σ = 331432614. Its totient is φ = 331432612.

The previous prime is 331432601. The next prime is 331432631. The reversal of 331432613 is 316234133.

It is a happy number.

Together with next prime (331432631) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 241429444 + 90003169 = 15538^2 + 9487^2 .

It is a cyclic number.

It is not a de Polignac number, because 331432613 - 2¹⁰ = 331431589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331432313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165716306 + 165716307.

It is an arithmetic number, because the mean of its divisors is an integer number (165716307).

Almost surely, 2^331432613 is an apocalyptic number.

It is an amenable number.

331432613 is a deficient number, since it is larger than the sum of its proper divisors (1).

331432613 is an equidigital number, since it uses as much as digits as its factorization.

331432613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 26.

The square root of 331432613 is about 18205.2907969085. The cubic root of 331432613 is about 692.0408755801.

Adding to 331432613 its reverse (316234133), we get a palindrome (647666746).

The spelling of 331432613 in words is "three hundred thirty-one million, four hundred thirty-two thousand, six hundred thirteen".