165437213 has 2 divisors, whose sum is σ = 165437214. Its totient is φ = 165437212.

The previous prime is 165437201. The next prime is 165437219. The reversal of 165437213 is 312734561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 162741049 + 2696164 = 12757^2 + 1642^2 .

It is a cyclic number.

It is not a de Polignac number, because 165437213 - 2⁴ = 165437197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165437213.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165437219) 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 as a sum of consecutive naturals, namely, 82718606 + 82718607.

It is an arithmetic number, because the mean of its divisors is an integer number (82718607).

Almost surely, 2^165437213 is an apocalyptic number.

It is an amenable number.

165437213 is a deficient number, since it is larger than the sum of its proper divisors (1).

165437213 is an equidigital number, since it uses as much as digits as its factorization.

165437213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 32.

The square root of 165437213 is about 12862.2398127231. The cubic root of 165437213 is about 548.9646782251.

The spelling of 165437213 in words is "one hundred sixty-five million, four hundred thirty-seven thousand, two hundred thirteen".