213440421320 has 64 divisors (see below), whose sum is σ = 560524423680. Its totient is φ = 71622556416.

The previous prime is 213440421289. The next prime is 213440421343. The reversal of 213440421320 is 23124044312.

It is a super-2 number, since 2×213440421320² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 213440421320.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 8096279 + ... + 8122598.

It is an arithmetic number, because the mean of its divisors is an integer number (8758194120).

Almost surely, 2^213440421320 is an apocalyptic number.

213440421320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213440421320 is an abundant number, since it is smaller than the sum of its proper divisors (347084002360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213440421320 is a wasteful number, since it uses less digits than its factorization.

213440421320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16218942 (or 16218938 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 213440421320 its reverse (23124044312), we get a palindrome (236564465632).

The spelling of 213440421320 in words is "two hundred thirteen billion, four hundred forty million, four hundred twenty-one thousand, three hundred twenty".