331242427 has 2 divisors, whose sum is σ = 331242428. Its totient is φ = 331242426.

The previous prime is 331242419. The next prime is 331242449. The reversal of 331242427 is 724242133.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 331242427 - 2³ = 331242419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 331242395 and 331242404.

It is not a weakly prime, because it can be changed into another prime (331242227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165621213 + 165621214.

It is an arithmetic number, because the mean of its divisors is an integer number (165621214).

Almost surely, 2^331242427 is an apocalyptic number.

331242427 is a deficient number, since it is larger than the sum of its proper divisors (1).

331242427 is an equidigital number, since it uses as much as digits as its factorization.

331242427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 28.

The square root of 331242427 is about 18200.0666757020. The cubic root of 331242427 is about 691.9084789641.

The spelling of 331242427 in words is "three hundred thirty-one million, two hundred forty-two thousand, four hundred twenty-seven".