331401223 has 2 divisors, whose sum is σ = 331401224. Its totient is φ = 331401222.

The previous prime is 331401221. The next prime is 331401251. The reversal of 331401223 is 322104133.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 331401223 - 2¹ = 331401221 is a prime.

Together with 331401221, 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 331401223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331401221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165700611 + 165700612.

It is an arithmetic number, because the mean of its divisors is an integer number (165700612).

Almost surely, 2^331401223 is an apocalyptic number.

331401223 is a deficient number, since it is larger than the sum of its proper divisors (1).

331401223 is an equidigital number, since it uses as much as digits as its factorization.

331401223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 331401223 is about 18204.4286644761. The cubic root of 331401223 is about 692.0190271479.

Adding to 331401223 its reverse (322104133), we get a palindrome (653505356).

The spelling of 331401223 in words is "three hundred thirty-one million, four hundred one thousand, two hundred twenty-three".