213468197 has 4 divisors (see below), whose sum is σ = 213786060. Its totient is φ = 213150336.

The previous prime is 213468169. The next prime is 213468209. The reversal of 213468197 is 791864312.

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 117310561 + 96157636 = 10831^2 + 9806^2 .

It is a cyclic number.

It is not a de Polignac number, because 213468197 - 2²⁶ = 146359333 is a prime.

It is a super-2 number, since 2×213468197² = 91137342260861618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213468137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157922 + ... + 159267.

It is an arithmetic number, because the mean of its divisors is an integer number (53446515).

Almost surely, 2^213468197 is an apocalyptic number.

It is an amenable number.

213468197 is a deficient number, since it is larger than the sum of its proper divisors (317863).

213468197 is an equidigital number, since it uses as much as digits as its factorization.

213468197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317862.

The product of its digits is 72576, while the sum is 41.

The square root of 213468197 is about 14610.5508794159. The cubic root of 213468197 is about 597.6465185750.

The spelling of 213468197 in words is "two hundred thirteen million, four hundred sixty-eight thousand, one hundred ninety-seven".