165402213 has 4 divisors (see below), whose sum is σ = 220536288. Its totient is φ = 110268140.

The previous prime is 165402203. The next prime is 165402217. The reversal of 165402213 is 312204561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 165402213 - 2⁹ = 165401701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165402217) 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, 27567033 + ... + 27567038.

It is an arithmetic number, because the mean of its divisors is an integer number (55134072).

Almost surely, 2^165402213 is an apocalyptic number.

It is an amenable number.

165402213 is a deficient number, since it is larger than the sum of its proper divisors (55134075).

165402213 is an equidigital number, since it uses as much as digits as its factorization.

165402213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55134074.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 165402213 is about 12860.8791690148. The cubic root of 165402213 is about 548.9259623915.

Adding to 165402213 its reverse (312204561), we get a palindrome (477606774).

The spelling of 165402213 in words is "one hundred sixty-five million, four hundred two thousand, two hundred thirteen".