213231234344 has 8 divisors (see below), whose sum is σ = 399808564410. Its totient is φ = 106615617168.

The previous prime is 213231234283. The next prime is 213231234367. The reversal of 213231234344 is 443432132312.

It can be written as a sum of positive squares in only one way, i.e., 211462022500 + 1769211844 = 459850^2 + 42062^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×213231234344² (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 213231234344.

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 as a sum of consecutive naturals, namely, 13326952139 + ... + 13326952154.

Almost surely, 2^213231234344 is an apocalyptic number.

It is an amenable number.

213231234344 is a deficient number, since it is larger than the sum of its proper divisors (186577330066).

213231234344 is a wasteful number, since it uses less digits than its factorization.

213231234344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26653904299 (or 26653904295 counting only the distinct ones).

The product of its digits is 41472, while the sum is 32.

Adding to 213231234344 its reverse (443432132312), we get a palindrome (656663366656).

The spelling of 213231234344 in words is "two hundred thirteen billion, two hundred thirty-one million, two hundred thirty-four thousand, three hundred forty-four".