197226861 has 8 divisors (see below), whose sum is σ = 283197600. Its totient is φ = 121370352.

The previous prime is 197226857. The next prime is 197226943. The reversal of 197226861 is 168622791.

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

It is not a de Polignac number, because 197226861 - 2² = 197226857 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197226461) 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, 2528511 + ... + 2528588.

It is an arithmetic number, because the mean of its divisors is an integer number (35399700).

Almost surely, 2^197226861 is an apocalyptic number.

It is an amenable number.

197226861 is a deficient number, since it is larger than the sum of its proper divisors (85970739).

197226861 is a wasteful number, since it uses less digits than its factorization.

197226861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5057115.

The product of its digits is 72576, while the sum is 42.

The square root of 197226861 is about 14043.7481108143. The cubic root of 197226861 is about 582.0880554289.

The spelling of 197226861 in words is "one hundred ninety-seven million, two hundred twenty-six thousand, eight hundred sixty-one".