331424399 has 2 divisors, whose sum is σ = 331424400. Its totient is φ = 331424398.

The previous prime is 331424377. The next prime is 331424437. The reversal of 331424399 is 993424133.

It is a happy number.

It is an a-pointer prime, because the next prime (331424437) can be obtained adding 331424399 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 331424399 - 2¹² = 331420303 is a prime.

It is a super-2 number, since 2×331424399² = 219684264505022402, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331424339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165712199 + 165712200.

It is an arithmetic number, because the mean of its divisors is an integer number (165712200).

Almost surely, 2^331424399 is an apocalyptic number.

331424399 is a deficient number, since it is larger than the sum of its proper divisors (1).

331424399 is an equidigital number, since it uses as much as digits as its factorization.

331424399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 38.

The square root of 331424399 is about 18205.0652017509. The cubic root of 331424399 is about 692.0351585097.

The spelling of 331424399 in words is "three hundred thirty-one million, four hundred twenty-four thousand, three hundred ninety-nine".