2130197 has 4 divisors (see below), whose sum is σ = 2133420. Its totient is φ = 2126976.

The previous prime is 2130173. The next prime is 2130209. The reversal of 2130197 is 7910312.

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 256036 + 1874161 = 506^2 + 1369^2 .

It is a cyclic number.

It is not a de Polignac number, because 2130197 - 2⁶ = 2130133 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2135197) 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, 218 + ... + 2075.

It is an arithmetic number, because the mean of its divisors is an integer number (533355).

2^2130197 is an apocalyptic number.

It is an amenable number.

2130197 is a deficient number, since it is larger than the sum of its proper divisors (3223).

2130197 is an equidigital number, since it uses as much as digits as its factorization.

2130197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3222.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 2130197 is about 1459.5194414601. The cubic root of 2130197 is about 128.6688016625.

The spelling of 2130197 in words is "two million, one hundred thirty thousand, one hundred ninety-seven".