197082218 has 4 divisors (see below), whose sum is σ = 295623330. Its totient is φ = 98541108.

The previous prime is 197082217. The next prime is 197082227. The reversal of 197082218 is 812280791.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 167521249 + 29560969 = 12943^2 + 5437^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (197082217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49270553 + ... + 49270556.

Almost surely, 2^197082218 is an apocalyptic number.

197082218 is a deficient number, since it is larger than the sum of its proper divisors (98541112).

197082218 is an equidigital number, since it uses as much as digits as its factorization.

197082218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98541111.

The product of its (nonzero) digits is 16128, while the sum is 38.

The square root of 197082218 is about 14038.5974370661. The cubic root of 197082218 is about 581.9457226300.

The spelling of 197082218 in words is "one hundred ninety-seven million, eighty-two thousand, two hundred eighteen".