197100977227 has 48 divisors (see below), whose sum is σ = 268029482112. Its totient is φ = 142808628480.

The previous prime is 197100977219. The next prime is 197100977231. The reversal of 197100977227 is 722779001791.

It is a happy number.

It is not a de Polignac number, because 197100977227 - 2³ = 197100977219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (197100977327) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 630948 + ... + 890110.

It is an arithmetic number, because the mean of its divisors is an integer number (5583947544).

Almost surely, 2^197100977227 is an apocalyptic number.

197100977227 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

197100977227 is a deficient number, since it is larger than the sum of its proper divisors (70928504885).

197100977227 is a wasteful number, since it uses less digits than its factorization.

197100977227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259288 (or 259281 counting only the distinct ones).

The product of its (nonzero) digits is 777924, while the sum is 52.

The spelling of 197100977227 in words is "one hundred ninety-seven billion, one hundred million, nine hundred seventy-seven thousand, two hundred twenty-seven".