197137851 has 8 divisors (see below), whose sum is σ = 262915344. Its totient is φ = 131392800.

The previous prime is 197137847. The next prime is 197137859. The reversal of 197137851 is 158731791.

It is a happy number.

197137851 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 197137851 - 2² = 197137847 is a prime.

It is not an unprimeable number, because it can be changed into a prime (197137859) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19545 + ... + 27861.

It is an arithmetic number, because the mean of its divisors is an integer number (32864418).

Almost surely, 2^197137851 is an apocalyptic number.

197137851 is a deficient number, since it is larger than the sum of its proper divisors (65777493).

197137851 is an equidigital number, since it uses as much as digits as its factorization.

197137851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16221.

The product of its digits is 52920, while the sum is 42.

The square root of 197137851 is about 14040.5787273887. The cubic root of 197137851 is about 582.0004753128. Note that the first 3 decimals are identical.

The spelling of 197137851 in words is "one hundred ninety-seven million, one hundred thirty-seven thousand, eight hundred fifty-one".