1216010165 has 32 divisors (see below), whose sum is σ = 1593820800. Its totient is φ = 887120640.

The previous prime is 1216010137. The next prime is 1216010177. The reversal of 1216010165 is 5610106121.

It is not a de Polignac number, because 1216010165 - 2⁶ = 1216010101 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1216010165.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1572719 + ... + 1573491.

It is an arithmetic number, because the mean of its divisors is an integer number (49806900).

Almost surely, 2^1216010165 is an apocalyptic number.

It is an amenable number.

1216010165 is a deficient number, since it is larger than the sum of its proper divisors (377810635).

1216010165 is a wasteful number, since it uses less digits than its factorization.

1216010165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1397.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 1216010165 is about 34871.3372987042. The cubic root of 1216010165 is about 1067.3636336365.

Adding to 1216010165 its reverse (5610106121), we get a palindrome (6826116286).

The spelling of 1216010165 in words is "one billion, two hundred sixteen million, ten thousand, one hundred sixty-five".