451311421213 has 4 divisors (see below), whose sum is σ = 455779851228. Its totient is φ = 446842991200.

The previous prime is 451311421207. The next prime is 451311421217. The reversal of 451311421213 is 312124113154.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 426321502489 + 24989918724 = 652933^2 + 158082^2 .

It is a cyclic number.

It is not a de Polignac number, because 451311421213 - 2⁵ = 451311421181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (451311421217) 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 in 3 ways as a sum of consecutive naturals, for example, 2234214856 + ... + 2234215057.

It is an arithmetic number, because the mean of its divisors is an integer number (113944962807).

Almost surely, 2^451311421213 is an apocalyptic number.

It is an amenable number.

451311421213 is a deficient number, since it is larger than the sum of its proper divisors (4468430015).

451311421213 is a wasteful number, since it uses less digits than its factorization.

451311421213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4468430014.

The product of its digits is 2880, while the sum is 28.

Adding to 451311421213 its reverse (312124113154), we get a palindrome (763435534367).

The spelling of 451311421213 in words is "four hundred fifty-one billion, three hundred eleven million, four hundred twenty-one thousand, two hundred thirteen".