321440212413 has 24 divisors (see below), whose sum is σ = 498348904248. Its totient is φ = 198925120512.

The previous prime is 321440212403. The next prime is 321440212417. The reversal of 321440212413 is 314212044123.

321440212413 is a `hidden beast` number, since 3 + 2 + 1 + 440 + 212 + 4 + 1 + 3 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 165776822649 + 155663389764 = 407157^2 + 394542^2 .

It is not a de Polignac number, because 321440212413 - 2⁵ = 321440212381 is a prime.

It is a super-2 number, since 2×321440212413² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321440212417) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14378670 + ... + 14401007.

It is an arithmetic number, because the mean of its divisors is an integer number (20764537677).

Almost surely, 2^321440212413 is an apocalyptic number.

It is an amenable number.

321440212413 is a deficient number, since it is larger than the sum of its proper divisors (176908691835).

321440212413 is a wasteful number, since it uses less digits than its factorization.

321440212413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28779773 (or 28779770 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 321440212413 its reverse (314212044123), we get a palindrome (635652256536).

The spelling of 321440212413 in words is "three hundred twenty-one billion, four hundred forty million, two hundred twelve thousand, four hundred thirteen".