197228521 has 8 divisors (see below), whose sum is σ = 226304064. Its totient is φ = 168378000.

The previous prime is 197228489. The next prime is 197228527. The reversal of 197228521 is 125822791.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 197228521 - 2⁵ = 197228489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (197228527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54370 + ... + 57883.

It is an arithmetic number, because the mean of its divisors is an integer number (28288008).

Almost surely, 2^197228521 is an apocalyptic number.

It is an amenable number.

197228521 is a deficient number, since it is larger than the sum of its proper divisors (29075543).

197228521 is a wasteful number, since it uses less digits than its factorization.

197228521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112511.

The product of its digits is 20160, while the sum is 37.

The square root of 197228521 is about 14043.8072117215. The cubic root of 197228521 is about 582.0896885118.

The spelling of 197228521 in words is "one hundred ninety-seven million, two hundred twenty-eight thousand, five hundred twenty-one".