813321361 has 8 divisors (see below), whose sum is σ = 861788160. Its totient is φ = 764923968.

The previous prime is 813321349. The next prime is 813321373. The reversal of 813321361 is 163123318.

It is an interprime number because it is at equal distance from previous prime (813321349) and next prime (813321373).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 813321361 - 2⁵ = 813321329 is a prime.

It is a super-2 number, since 2×813321361² = 1322983272517784642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (813321661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7840 + ... + 41086.

It is an arithmetic number, because the mean of its divisors is an integer number (107723520).

Almost surely, 2^813321361 is an apocalyptic number.

It is an amenable number.

813321361 is a deficient number, since it is larger than the sum of its proper divisors (48466799).

813321361 is a wasteful number, since it uses less digits than its factorization.

813321361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34703.

The product of its digits is 2592, while the sum is 28.

The square root of 813321361 is about 28518.7896131656. The cubic root of 813321361 is about 933.4421180882.

Adding to 813321361 its reverse (163123318), we get a palindrome (976444679).

The spelling of 813321361 in words is "eight hundred thirteen million, three hundred twenty-one thousand, three hundred sixty-one".