331145453 has 2 divisors, whose sum is σ = 331145454. Its totient is φ = 331145452.

The previous prime is 331145443. The next prime is 331145531. The reversal of 331145453 is 354541133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 293162884 + 37982569 = 17122^2 + 6163^2 .

It is an emirp because it is prime and its reverse (354541133) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 331145453 - 2¹⁴ = 331129069 is a prime.

It is a super-2 number, since 2×331145453² = 219314622085150418, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331145443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165572726 + 165572727.

It is an arithmetic number, because the mean of its divisors is an integer number (165572727).

Almost surely, 2^331145453 is an apocalyptic number.

It is an amenable number.

331145453 is a deficient number, since it is larger than the sum of its proper divisors (1).

331145453 is an equidigital number, since it uses as much as digits as its factorization.

331145453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10800, while the sum is 29.

The square root of 331145453 is about 18197.4023695691. The cubic root of 331145453 is about 691.8409517029.

Adding to 331145453 its reverse (354541133), we get a palindrome (685686586).

The spelling of 331145453 in words is "three hundred thirty-one million, one hundred forty-five thousand, four hundred fifty-three".