213644411430 has 64 divisors (see below), whose sum is σ = 531517731840. Its totient is φ = 54894236544.

The previous prime is 213644411411. The next prime is 213644411473. The reversal of 213644411430 is 34114446312.

It is a super-2 number, since 2×213644411430² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 213644411391 and 213644411400.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 171567 + ... + 675813.

It is an arithmetic number, because the mean of its divisors is an integer number (8304964560).

Almost surely, 2^213644411430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213644411430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (265758865920).

213644411430 is an abundant number, since it is smaller than the sum of its proper divisors (317873320410).

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

213644411430 is a wasteful number, since it uses less digits than its factorization.

213644411430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504773.

The product of its (nonzero) digits is 27648, while the sum is 33.

Adding to 213644411430 its reverse (34114446312), we get a palindrome (247758857742).

The spelling of 213644411430 in words is "two hundred thirteen billion, six hundred forty-four million, four hundred eleven thousand, four hundred thirty".