197681211 has 48 divisors (see below), whose sum is σ = 357477120. Its totient is φ = 102479040.

The previous prime is 197681207. The next prime is 197681233. The reversal of 197681211 is 112186791.

It is not a de Polignac number, because 197681211 - 2² = 197681207 is a prime.

It is a super-2 number, since 2×197681211² = 78155722364853042, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (197681311) 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 47 ways as a sum of consecutive naturals, for example, 46276 + ... + 50366.

It is an arithmetic number, because the mean of its divisors is an integer number (7447440).

Almost surely, 2^197681211 is an apocalyptic number.

197681211 is a deficient number, since it is larger than the sum of its proper divisors (159795909).

197681211 is a wasteful number, since it uses less digits than its factorization.

197681211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4176 (or 4173 counting only the distinct ones).

The product of its digits is 6048, while the sum is 36.

The square root of 197681211 is about 14059.9150424176. The cubic root of 197681211 is about 582.5346965524.

The spelling of 197681211 in words is "one hundred ninety-seven million, six hundred eighty-one thousand, two hundred eleven".