213243323430 has 32 divisors (see below), whose sum is σ = 512056772064. Its totient is φ = 56834575616.

The previous prime is 213243323417. The next prime is 213243323437. The reversal of 213243323430 is 34323342312.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213243323437) by changing a digit.

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, 1837167 + ... + 1949786.

It is an arithmetic number, because the mean of its divisors is an integer number (16001774127).

Almost surely, 2^213243323430 is an apocalyptic number.

213243323430 is an abundant number, since it is smaller than the sum of its proper divisors (298813448634).

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

213243323430 is a wasteful number, since it uses less digits than its factorization.

213243323430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3788840.

The product of its (nonzero) digits is 31104, while the sum is 30.

Adding to 213243323430 its reverse (34323342312), we get a palindrome (247566665742).

The spelling of 213243323430 in words is "two hundred thirteen billion, two hundred forty-three million, three hundred twenty-three thousand, four hundred thirty".