100722216 has 32 divisors (see below), whose sum is σ = 287778240. Its totient is φ = 28777728.

The previous prime is 100722179. The next prime is 100722227. The reversal of 100722216 is 612227001.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 100722192 and 100722201.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 299601 + ... + 299936.

It is an arithmetic number, because the mean of its divisors is an integer number (8993070).

Almost surely, 2^100722216 is an apocalyptic number.

It is an amenable number.

100722216 is an abundant number, since it is smaller than the sum of its proper divisors (187056024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

100722216 is a wasteful number, since it uses less digits than its factorization.

100722216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599553 (or 599549 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 100722216 is about 10036.0458348894. The cubic root of 100722216 is about 465.2736139722.

Adding to 100722216 its reverse (612227001), we get a palindrome (712949217).

The spelling of 100722216 in words is "one hundred million, seven hundred twenty-two thousand, two hundred sixteen".