21313343115315 has 16 divisors (see below), whose sum is σ = 37890387760800. Its totient is φ = 11367116328096.

The previous prime is 21313343115313. The next prime is 21313343115359. The reversal of 21313343115315 is 51351134331312.

21313343115315 is a `hidden beast` number, since 2 + 1 + 3 + 1 + 334 + 3 + 1 + 1 + 5 + 315 = 666.

It is not a de Polignac number, because 21313343115315 - 2¹ = 21313343115313 is a prime.

It is a super-2 number, since 2×21313343115315² (a number of 27 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 21313343115315.

It is not an unprimeable number, because it can be changed into a prime (21313343115313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78938307700 + ... + 78938307969.

It is an arithmetic number, because the mean of its divisors is an integer number (2368149235050).

Almost surely, 2^{21313343115315} is an apocalyptic number.

21313343115315 is a deficient number, since it is larger than the sum of its proper divisors (16577044645485).

21313343115315 is a wasteful number, since it uses less digits than its factorization.

21313343115315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157876615683 (or 157876615677 counting only the distinct ones).

The product of its digits is 48600, while the sum is 36.

Adding to 21313343115315 its reverse (51351134331312), we get a palindrome (72664477446627).

The spelling of 21313343115315 in words is "twenty-one trillion, three hundred thirteen billion, three hundred forty-three million, one hundred fifteen thousand, three hundred fifteen".