213421234530 has 256 divisors, whose sum is σ = 618988511232. Its totient is φ = 46041600000.

The previous prime is 213421234529. The next prime is 213421234549. The reversal of 213421234530 is 35432124312.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 195619285 + ... + 195620375.

It is an arithmetic number, because the mean of its divisors is an integer number (2417923872).

Almost surely, 2^213421234530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213421234530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (309494255616).

213421234530 is an abundant number, since it is smaller than the sum of its proper divisors (405567276702).

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

213421234530 is a wasteful number, since it uses less digits than its factorization.

213421234530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1633.

The product of its (nonzero) digits is 17280, while the sum is 30.

Adding to 213421234530 its reverse (35432124312), we get a palindrome (248853358842).

The spelling of 213421234530 in words is "two hundred thirteen billion, four hundred twenty-one million, two hundred thirty-four thousand, five hundred thirty".