215342431312 has 40 divisors (see below), whose sum is σ = 424127040392. Its totient is φ = 105890803200.

The previous prime is 215342431267. The next prime is 215342431327. The reversal of 215342431312 is 213134243512.

It can be written as a sum of positive squares in 4 ways, for example, as 5966635536 + 209375795776 = 77244^2 + 457576^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9886738 + ... + 9908494.

Almost surely, 2^215342431312 is an apocalyptic number.

It is an amenable number.

215342431312 is a deficient number, since it is larger than the sum of its proper divisors (208784609080).

215342431312 is a wasteful number, since it uses less digits than its factorization.

215342431312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31967 (or 31961 counting only the distinct ones).

The product of its digits is 17280, while the sum is 31.

Adding to 215342431312 its reverse (213134243512), we get a palindrome (428476674824).

The spelling of 215342431312 in words is "two hundred fifteen billion, three hundred forty-two million, four hundred thirty-one thousand, three hundred twelve".