213097150165 has 4 divisors (see below), whose sum is σ = 255716580204. Its totient is φ = 170477720128.

The previous prime is 213097150159. The next prime is 213097150181. The reversal of 213097150165 is 561051790312.

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 111475186641 + 101621963524 = 333879^2 + 318782^2 .

It is a cyclic number.

It is not a de Polignac number, because 213097150165 - 2²¹ = 213095053013 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21309715012 + ... + 21309715021.

It is an arithmetic number, because the mean of its divisors is an integer number (63929145051).

Almost surely, 2^213097150165 is an apocalyptic number.

It is an amenable number.

213097150165 is a deficient number, since it is larger than the sum of its proper divisors (42619430039).

213097150165 is an equidigital number, since it uses as much as digits as its factorization.

213097150165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42619430038.

The product of its (nonzero) digits is 56700, while the sum is 40.

The spelling of 213097150165 in words is "two hundred thirteen billion, ninety-seven million, one hundred fifty thousand, one hundred sixty-five".