21525716173103 has 8 divisors (see below), whose sum is σ = 21611321130672. Its totient is φ = 21440125536256.

The previous prime is 21525716173069. The next prime is 21525716173109. The reversal of 21525716173103 is 30137161752512.

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 21525716173103 - 2⁴⁴ = 3933530128687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21525716173109) 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, 562925 + ... + 6585462.

It is an arithmetic number, because the mean of its divisors is an integer number (2701415141334).

Almost surely, 2^{21525716173103} is an apocalyptic number.

21525716173103 is a deficient number, since it is larger than the sum of its proper divisors (85604957569).

21525716173103 is a wasteful number, since it uses less digits than its factorization.

21525716173103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7160361.

The product of its (nonzero) digits is 264600, while the sum is 44.

The spelling of 21525716173103 in words is "twenty-one trillion, five hundred twenty-five billion, seven hundred sixteen million, one hundred seventy-three thousand, one hundred three".