197210881 has 4 divisors (see below), whose sum is σ = 225383872. Its totient is φ = 169037892.

The previous prime is 197210879. The next prime is 197210927. The reversal of 197210881 is 188012791.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 197210881 - 2¹ = 197210879 is a prime.

It is a super-2 number, since 2×197210881² = 77784263169592322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 197210881.

It is not an unprimeable number, because it can be changed into a prime (197210821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14086485 + ... + 14086498.

It is an arithmetic number, because the mean of its divisors is an integer number (56345968).

Almost surely, 2^197210881 is an apocalyptic number.

It is an amenable number.

197210881 is a deficient number, since it is larger than the sum of its proper divisors (28172991).

197210881 is an equidigital number, since it uses as much as digits as its factorization.

197210881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28172990.

The product of its (nonzero) digits is 8064, while the sum is 37.

The square root of 197210881 is about 14043.1791628534. The cubic root of 197210881 is about 582.0723340775.

The spelling of 197210881 in words is "one hundred ninety-seven million, two hundred ten thousand, eight hundred eighty-one".