21530602224163 has 8 divisors (see below), whose sum is σ = 22467805049088. Its totient is φ = 20593490206344.

The previous prime is 21530602224143. The next prime is 21530602224167. The reversal of 21530602224163 is 36142220603512.

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 21530602224163 - 2³³ = 21522012289571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21530602224167) 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, 22217031 + ... + 23165872.

It is an arithmetic number, because the mean of its divisors is an integer number (2808475631136).

Almost surely, 2^{21530602224163} is an apocalyptic number.

21530602224163 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21530602224163 is a deficient number, since it is larger than the sum of its proper divisors (937202824925).

21530602224163 is a wasteful number, since it uses less digits than its factorization.

21530602224163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45403553.

The product of its (nonzero) digits is 103680, while the sum is 37.

Adding to 21530602224163 its reverse (36142220603512), we get a palindrome (57672822827675).

The spelling of 21530602224163 in words is "twenty-one trillion, five hundred thirty billion, six hundred two million, two hundred twenty-four thousand, one hundred sixty-three".