197215137 has 12 divisors (see below), whose sum is σ = 325561600. Its totient is φ = 112694328.

The previous prime is 197215097. The next prime is 197215141. The reversal of 197215137 is 731512791.

It is not a de Polignac number, because 197215137 - 2⁸ = 197214881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (197215177) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1565137 + ... + 1565262.

Almost surely, 2^197215137 is an apocalyptic number.

It is an amenable number.

197215137 is a deficient number, since it is larger than the sum of its proper divisors (128346463).

197215137 is a wasteful number, since it uses less digits than its factorization.

197215137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3130412 (or 3130409 counting only the distinct ones).

The product of its digits is 13230, while the sum is 36.

The square root of 197215137 is about 14043.3306946750. The cubic root of 197215137 is about 582.0765212738.

The spelling of 197215137 in words is "one hundred ninety-seven million, two hundred fifteen thousand, one hundred thirty-seven".