331340453 has 2 divisors, whose sum is σ = 331340454. Its totient is φ = 331340452.

The previous prime is 331340441. The next prime is 331340467. The reversal of 331340453 is 354043133.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 258630724 + 72709729 = 16082^2 + 8527^2 .

It is a cyclic number.

It is not a de Polignac number, because 331340453 - 2⁴ = 331340437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331340423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165670226 + 165670227.

It is an arithmetic number, because the mean of its divisors is an integer number (165670227).

Almost surely, 2^331340453 is an apocalyptic number.

It is an amenable number.

331340453 is a deficient number, since it is larger than the sum of its proper divisors (1).

331340453 is an equidigital number, since it uses as much as digits as its factorization.

331340453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 26.

The square root of 331340453 is about 18202.7594886050. The cubic root of 331340453 is about 691.9767253858.

Adding to 331340453 its reverse (354043133), we get a palindrome (685383586).

The spelling of 331340453 in words is "three hundred thirty-one million, three hundred forty thousand, four hundred fifty-three".