451813613 has 2 divisors, whose sum is σ = 451813614. Its totient is φ = 451813612.

The previous prime is 451813603. The next prime is 451813619. The reversal of 451813613 is 316318154.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 272976484 + 178837129 = 16522^2 + 13373^2 .

451813613 is a truncatable prime.

It is a cyclic number.

It is not a de Polignac number, because 451813613 - 2¹⁰ = 451812589 is a prime.

It is a super-2 number, since 2×451813613² = 408271081784227538, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 451813613.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (451813619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225906806 + 225906807.

It is an arithmetic number, because the mean of its divisors is an integer number (225906807).

Almost surely, 2^451813613 is an apocalyptic number.

It is an amenable number.

451813613 is a deficient number, since it is larger than the sum of its proper divisors (1).

451813613 is an equidigital number, since it uses as much as digits as its factorization.

451813613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 32.

The square root of 451813613 is about 21255.9077199728. The cubic root of 451813613 is about 767.3375256172.

The spelling of 451813613 in words is "four hundred fifty-one million, eight hundred thirteen thousand, six hundred thirteen".