2125318213 has 4 divisors (see below), whose sum is σ = 2131408300. Its totient is φ = 2119228128.

The previous prime is 2125318187. The next prime is 2125318219. The reversal of 2125318213 is 3128135212.

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 1177725124 + 947593089 = 34318^2 + 30783^2 .

It is a cyclic number.

It is not a de Polignac number, because 2125318213 - 2¹³ = 2125310021 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 (2125318219) 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, 3044520 + ... + 3045217.

It is an arithmetic number, because the mean of its divisors is an integer number (532852075).

Almost surely, 2^2125318213 is an apocalyptic number.

It is an amenable number.

2125318213 is a deficient number, since it is larger than the sum of its proper divisors (6090087).

2125318213 is an equidigital number, since it uses as much as digits as its factorization.

2125318213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6090086.

The product of its digits is 2880, while the sum is 28.

The square root of 2125318213 is about 46101.1736618494. The cubic root of 2125318213 is about 1285.7049658695.

The spelling of 2125318213 in words is "two billion, one hundred twenty-five million, three hundred eighteen thousand, two hundred thirteen".