21616231105513 has 8 divisors (see below), whose sum is σ = 23581523309760. Its totient is φ = 19650968948880.

The previous prime is 21616231105499. The next prime is 21616231105517. The reversal of 21616231105513 is 31550113261612.

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 21616231105513 - 2⁵ = 21616231105481 is a prime.

It is a super-2 number, since 2×21616231105513² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21616231105517) 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, 5994370 + ... + 8897467.

It is an arithmetic number, because the mean of its divisors is an integer number (2947690413720).

Almost surely, 2^{21616231105513} is an apocalyptic number.

It is an amenable number.

21616231105513 is a deficient number, since it is larger than the sum of its proper divisors (1965292204247).

21616231105513 is a wasteful number, since it uses less digits than its factorization.

21616231105513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15023807.

The product of its (nonzero) digits is 32400, while the sum is 37.

The spelling of 21616231105513 in words is "twenty-one trillion, six hundred sixteen billion, two hundred thirty-one million, one hundred five thousand, five hundred thirteen".