331421269 has 2 divisors, whose sum is σ = 331421270. Its totient is φ = 331421268.

The previous prime is 331421267. The next prime is 331421303. The reversal of 331421269 is 962124133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 289340100 + 42081169 = 17010^2 + 6487^2 .

It is a cyclic number.

It is not a de Polignac number, because 331421269 - 2¹ = 331421267 is a prime.

It is a super-2 number, since 2×331421269² = 219680115091140722, which contains 22 as substring.

Together with 331421267, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 331421269.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331421263) 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, 165710634 + 165710635.

It is an arithmetic number, because the mean of its divisors is an integer number (165710635).

Almost surely, 2^331421269 is an apocalyptic number.

It is an amenable number.

331421269 is a deficient number, since it is larger than the sum of its proper divisors (1).

331421269 is an equidigital number, since it uses as much as digits as its factorization.

331421269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 31.

The square root of 331421269 is about 18204.9792364617. The cubic root of 331421269 is about 692.0329799567.

The spelling of 331421269 in words is "three hundred thirty-one million, four hundred twenty-one thousand, two hundred sixty-nine".