21150216162317 has 8 divisors (see below), whose sum is σ = 23074878158400. Its totient is φ = 19225873344960.

The previous prime is 21150216162253. The next prime is 21150216162331. The reversal of 21150216162317 is 71326161205112.

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 21150216162317 - 2⁶ = 21150216162253 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 (21150216162337) 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, 79656113 + ... + 79921190.

It is an arithmetic number, because the mean of its divisors is an integer number (2884359769800).

Almost surely, 2^{21150216162317} is an apocalyptic number.

It is an amenable number.

21150216162317 is a deficient number, since it is larger than the sum of its proper divisors (1924661996083).

21150216162317 is a wasteful number, since it uses less digits than its factorization.

21150216162317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159589363.

The product of its (nonzero) digits is 30240, while the sum is 38.

Adding to 21150216162317 its reverse (71326161205112), we get a palindrome (92476377367429).

The spelling of 21150216162317 in words is "twenty-one trillion, one hundred fifty billion, two hundred sixteen million, one hundred sixty-two thousand, three hundred seventeen".