221652227172365 has 64 divisors (see below), whose sum is σ = 291795331709952. Its totient is φ = 160297319347200.

The previous prime is 221652227172349. The next prime is 221652227172419. The reversal of 221652227172365 is 563271722256122.

It is not a de Polignac number, because 221652227172365 - 2⁴ = 221652227172349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 18981943907 + ... + 18981955583.

It is an arithmetic number, because the mean of its divisors is an integer number (4559302057968).

Almost surely, 2^{221652227172365} is an apocalyptic number.

It is an amenable number.

221652227172365 is a deficient number, since it is larger than the sum of its proper divisors (70143104537587).

221652227172365 is a wasteful number, since it uses less digits than its factorization.

221652227172365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14310.

The product of its digits is 8467200, while the sum is 53.

The spelling of 221652227172365 in words is "two hundred twenty-one trillion, six hundred fifty-two billion, two hundred twenty-seven million, one hundred seventy-two thousand, three hundred sixty-five".