451171213 has 2 divisors, whose sum is σ = 451171214. Its totient is φ = 451171212.

The previous prime is 451171199. The next prime is 451171249. The reversal of 451171213 is 312171154.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 380913289 + 70257924 = 19517^2 + 8382^2 .

It is a cyclic number.

It is not a de Polignac number, because 451171213 - 2²¹ = 449074061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (451177213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225585606 + 225585607.

It is an arithmetic number, because the mean of its divisors is an integer number (225585607).

Almost surely, 2^451171213 is an apocalyptic number.

It is an amenable number.

451171213 is a deficient number, since it is larger than the sum of its proper divisors (1).

451171213 is an equidigital number, since it uses as much as digits as its factorization.

451171213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 840, while the sum is 25.

The square root of 451171213 is about 21240.7912517401. The cubic root of 451171213 is about 766.9736798331.

The spelling of 451171213 in words is "four hundred fifty-one million, one hundred seventy-one thousand, two hundred thirteen".