165425213 has 2 divisors, whose sum is σ = 165425214. Its totient is φ = 165425212.

The previous prime is 165425209. The next prime is 165425219. The reversal of 165425213 is 312524561.

165425213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117787609 + 47637604 = 10853^2 + 6902^2 .

It is a cyclic number.

It is not a de Polignac number, because 165425213 - 2² = 165425209 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165425219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82712606 + 82712607.

It is an arithmetic number, because the mean of its divisors is an integer number (82712607).

Almost surely, 2^165425213 is an apocalyptic number.

It is an amenable number.

165425213 is a deficient number, since it is larger than the sum of its proper divisors (1).

165425213 is an equidigital number, since it uses as much as digits as its factorization.

165425213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7200, while the sum is 29.

The square root of 165425213 is about 12861.7733225244. The cubic root of 165425213 is about 548.9514048402.

Adding to 165425213 its reverse (312524561), we get a palindrome (477949774).

The spelling of 165425213 in words is "one hundred sixty-five million, four hundred twenty-five thousand, two hundred thirteen".