451331213 has 2 divisors, whose sum is σ = 451331214. Its totient is φ = 451331212.

The previous prime is 451331207. The next prime is 451331219. The reversal of 451331213 is 312133154.

It is a balanced prime because it is at equal distance from previous prime (451331207) and next prime (451331219).

It can be written as a sum of positive squares in only one way, i.e., 422836969 + 28494244 = 20563^2 + 5338^2 .

It is a cyclic number.

It is not a de Polignac number, because 451331213 - 2¹² = 451327117 is a prime.

It is a Sophie Germain 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 (451331219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225665606 + 225665607.

It is an arithmetic number, because the mean of its divisors is an integer number (225665607).

Almost surely, 2^451331213 is an apocalyptic number.

It is an amenable number.

451331213 is a deficient number, since it is larger than the sum of its proper divisors (1).

451331213 is an equidigital number, since it uses as much as digits as its factorization.

451331213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 23.

The square root of 451331213 is about 21244.5572559185. The cubic root of 451331213 is about 767.0643337296.

Adding to 451331213 its reverse (312133154), we get a palindrome (763464367).

The spelling of 451331213 in words is "four hundred fifty-one million, three hundred thirty-one thousand, two hundred thirteen".