100722165 has 16 divisors (see below), whose sum is σ = 161431488. Its totient is φ = 53626496.

The previous prime is 100722151. The next prime is 100722169. The reversal of 100722165 is 561227001.

It is a cyclic number.

It is not a de Polignac number, because 100722165 - 2¹⁵ = 100689397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100722169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3814 + ... + 14696.

It is an arithmetic number, because the mean of its divisors is an integer number (10089468).

Almost surely, 2^100722165 is an apocalyptic number.

100722165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

100722165 is a deficient number, since it is larger than the sum of its proper divisors (60709323).

100722165 is a wasteful number, since it uses less digits than its factorization.

100722165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11508.

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 100722165 is about 10036.0432940477. The cubic root of 100722165 is about 465.2735354428.

Adding to 100722165 its reverse (561227001), we get a palindrome (661949166).

The spelling of 100722165 in words is "one hundred million, seven hundred twenty-two thousand, one hundred sixty-five".