21613143240315 has 288 divisors, whose sum is σ = 42637339180800. Its totient is φ = 10112715993600.

The previous prime is 21613143240313. The next prime is 21613143240323. The reversal of 21613143240315 is 51304234131612.

21613143240315 is a `hidden beast` number, since 2 + 1 + 6 + 1 + 3 + 14 + 324 + 0 + 315 = 666.

It is not a de Polignac number, because 21613143240315 - 2¹ = 21613143240313 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21613143240315.

It is not an unprimeable number, because it can be changed into a prime (21613143240313) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 26649991260 + ... + 26649992070.

It is an arithmetic number, because the mean of its divisors is an integer number (148046316600).

Almost surely, 2^{21613143240315} is an apocalyptic number.

21613143240315 is a deficient number, since it is larger than the sum of its proper divisors (21024195940485).

21613143240315 is a wasteful number, since it uses less digits than its factorization.

21613143240315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1799 (or 1785 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

Adding to 21613143240315 its reverse (51304234131612), we get a palindrome (72917377371927).

The spelling of 21613143240315 in words is "twenty-one trillion, six hundred thirteen billion, one hundred forty-three million, two hundred forty thousand, three hundred fifteen".