2145254213 has 2 divisors, whose sum is σ = 2145254214. Its totient is φ = 2145254212.

The previous prime is 2145254197. The next prime is 2145254249. The reversal of 2145254213 is 3124525412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1850548324 + 294705889 = 43018^2 + 17167^2 .

It is a cyclic number.

It is not a de Polignac number, because 2145254213 - 2⁴ = 2145254197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2145253213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072627106 + 1072627107.

It is an arithmetic number, because the mean of its divisors is an integer number (1072627107).

Almost surely, 2^2145254213 is an apocalyptic number.

It is an amenable number.

2145254213 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145254213 is an equidigital number, since it uses as much as digits as its factorization.

2145254213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9600, while the sum is 29.

The square root of 2145254213 is about 46316.8890686756. The cubic root of 2145254213 is about 1289.7125359502.

Adding to 2145254213 its reverse (3124525412), we get a palindrome (5269779625).

The spelling of 2145254213 in words is "two billion, one hundred forty-five million, two hundred fifty-four thousand, two hundred thirteen".