197221211 has 16 divisors (see below), whose sum is σ = 222321888. Its totient is φ = 173376000.

The previous prime is 197221187. The next prime is 197221243. The reversal of 197221211 is 112122791.

It is a cyclic number.

It is not a de Polignac number, because 197221211 - 2⁶ = 197221147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197221261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69011 + ... + 71811.

It is an arithmetic number, because the mean of its divisors is an integer number (13895118).

Almost surely, 2^197221211 is an apocalyptic number.

197221211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

197221211 is a deficient number, since it is larger than the sum of its proper divisors (25100677).

197221211 is a wasteful number, since it uses less digits than its factorization.

197221211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3022.

The product of its digits is 504, while the sum is 26.

The square root of 197221211 is about 14043.5469522482. The cubic root of 197221211 is about 582.0824969755.

The spelling of 197221211 in words is "one hundred ninety-seven million, two hundred twenty-one thousand, two hundred eleven".