21775016227 has 8 divisors (see below), whose sum is σ = 21936438720. Its totient is φ = 21613662120.

The previous prime is 21775016213. The next prime is 21775016257. The reversal of 21775016227 is 72261057712.

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 21775016227 - 2⁷ = 21775016099 is a prime.

It is a super-2 number, since 2×21775016227² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21775016227.

It is not an unprimeable number, because it can be changed into a prime (21775016257) 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, 747852 + ... + 776422.

It is an arithmetic number, because the mean of its divisors is an integer number (2742054840).

Almost surely, 2^21775016227 is an apocalyptic number.

21775016227 is a deficient number, since it is larger than the sum of its proper divisors (161422493).

21775016227 is a wasteful number, since it uses less digits than its factorization.

21775016227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34193.

The product of its (nonzero) digits is 82320, while the sum is 40.

The spelling of 21775016227 in words is "twenty-one billion, seven hundred seventy-five million, sixteen thousand, two hundred twenty-seven".