21613510334271 has 8 divisors (see below), whose sum is σ = 28818036396720. Its totient is φ = 14408995580672.

The previous prime is 21613510334267. The next prime is 21613510334303. The reversal of 21613510334271 is 17243301531612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21613510334271 - 2² = 21613510334267 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21613510334201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3959881 + ... + 7675133.

It is an arithmetic number, because the mean of its divisors is an integer number (3602254549590).

Almost surely, 2^{21613510334271} is an apocalyptic number.

21613510334271 is a deficient number, since it is larger than the sum of its proper divisors (7204526062449).

21613510334271 is a wasteful number, since it uses less digits than its factorization.

21613510334271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5654425.

The product of its (nonzero) digits is 90720, while the sum is 39.

Adding to 21613510334271 its reverse (17243301531612), we get a palindrome (38856811865883).

The spelling of 21613510334271 in words is "twenty-one trillion, six hundred thirteen billion, five hundred ten million, three hundred thirty-four thousand, two hundred seventy-one".