202130197 has 4 divisors (see below), whose sum is σ = 202165740. Its totient is φ = 202094656.

The previous prime is 202130191. The next prime is 202130213. The reversal of 202130197 is 791031202.

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 51969681 + 150160516 = 7209^2 + 12254^2 .

It is a 3-Lehmer number, since φ(202130197) divides (202130197-1)³.

It is a cyclic number.

It is not a de Polignac number, because 202130197 - 2¹¹ = 202128149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202130191) 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, 7108 + ... + 21325.

It is an arithmetic number, because the mean of its divisors is an integer number (50541435).

It is a Poulet number, since it divides 2^202130196-1.

Almost surely, 2^202130197 is an apocalyptic number.

202130197 is the 7109-th decagonal number.

It is an amenable number.

202130197 is a deficient number, since it is larger than the sum of its proper divisors (35543).

202130197 is an equidigital number, since it uses as much as digits as its factorization.

202130197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35542.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 202130197 is about 14217.2499802177. The cubic root of 202130197 is about 586.8724642077.

Adding to 202130197 its reverse (791031202), we get a palindrome (993161399).

The spelling of 202130197 in words is "two hundred two million, one hundred thirty thousand, one hundred ninety-seven".