221927697 has 12 divisors (see below), whose sum is σ = 321459840. Its totient is φ = 147537528.

The previous prime is 221927689. The next prime is 221927701. The reversal of 221927697 is 796729122.

It is not a de Polignac number, because 221927697 - 2³ = 221927689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221927617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31113 + ... + 37574.

It is an arithmetic number, because the mean of its divisors is an integer number (26788320).

Almost surely, 2^221927697 is an apocalyptic number.

It is an amenable number.

221927697 is a deficient number, since it is larger than the sum of its proper divisors (99532143).

221927697 is a wasteful number, since it uses less digits than its factorization.

221927697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69052 (or 69049 counting only the distinct ones).

The product of its digits is 190512, while the sum is 45.

The square root of 221927697 is about 14897.2378983488. The cubic root of 221927697 is about 605.4391520473.

The spelling of 221927697 in words is "two hundred twenty-one million, nine hundred twenty-seven thousand, six hundred ninety-seven".