215631533431343 has 4 divisors (see below), whose sum is σ = 215631706367280. Its totient is φ = 215631360495408.

The previous prime is 215631533431339. The next prime is 215631533431411. The reversal of 215631533431343 is 343134335136512.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 215631533431343 - 2² = 215631533431339 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215631533431243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84583955 + ... + 87095972.

It is an arithmetic number, because the mean of its divisors is an integer number (53907926591820).

Almost surely, 2^{215631533431343} is an apocalyptic number.

215631533431343 is a deficient number, since it is larger than the sum of its proper divisors (172935937).

215631533431343 is a wasteful number, since it uses less digits than its factorization.

215631533431343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172935936.

The product of its digits is 3499200, while the sum is 47.

Adding to 215631533431343 its reverse (343134335136512), we get a palindrome (558765868567855).

The spelling of 215631533431343 in words is "two hundred fifteen trillion, six hundred thirty-one billion, five hundred thirty-three million, four hundred thirty-one thousand, three hundred forty-three".