215321043320 has 16 divisors (see below), whose sum is σ = 484472347560. Its totient is φ = 86128417312.

The previous prime is 215321043263. The next prime is 215321043323. The reversal of 215321043320 is 23340123512.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 215321043320.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215321043323) 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, 2691513002 + ... + 2691513081.

Almost surely, 2^215321043320 is an apocalyptic number.

215321043320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215321043320 is an abundant number, since it is smaller than the sum of its proper divisors (269151304240).

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

215321043320 is a wasteful number, since it uses less digits than its factorization.

215321043320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5383026094 (or 5383026090 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 215321043320 its reverse (23340123512), we get a palindrome (238661166832).

The spelling of 215321043320 in words is "two hundred fifteen billion, three hundred twenty-one million, forty-three thousand, three hundred twenty".