229215197 has 4 divisors (see below), whose sum is σ = 229298940. Its totient is φ = 229131456.

The previous prime is 229215191. The next prime is 229215211. The reversal of 229215197 is 791512922.

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

It can be written as a sum of positive squares in 2 ways, for example, as 83795716 + 145419481 = 9154^2 + 12059^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-229215197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 229215197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (229215191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37622 + ... + 43287.

It is an arithmetic number, because the mean of its divisors is an integer number (57324735).

Almost surely, 2^229215197 is an apocalyptic number.

It is an amenable number.

229215197 is a deficient number, since it is larger than the sum of its proper divisors (83743).

229215197 is an equidigital number, since it uses as much as digits as its factorization.

229215197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83742.

The product of its digits is 22680, while the sum is 38.

The square root of 229215197 is about 15139.8545897905. The cubic root of 229215197 is about 611.9948995332.

The spelling of 229215197 in words is "two hundred twenty-nine million, two hundred fifteen thousand, one hundred ninety-seven".