213431242343 has 8 divisors (see below), whose sum is σ = 233048294400. Its totient is φ = 193849892280.

The previous prime is 213431242327. The next prime is 213431242351. The reversal of 213431242343 is 343242134312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 213431242343 - 2⁴ = 213431242327 is a prime.

It is a super-2 number, since 2×213431242343² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213431242373) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8912993 + ... + 8936906.

It is an arithmetic number, because the mean of its divisors is an integer number (29131036800).

Almost surely, 2^213431242343 is an apocalyptic number.

213431242343 is a deficient number, since it is larger than the sum of its proper divisors (19617052057).

213431242343 is a wasteful number, since it uses less digits than its factorization.

213431242343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17850997.

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

Adding to 213431242343 its reverse (343242134312), we get a palindrome (556673376655).

The spelling of 213431242343 in words is "two hundred thirteen billion, four hundred thirty-one million, two hundred forty-two thousand, three hundred forty-three".