100215500 has 192 divisors, whose sum is σ = 289336320. Its totient is φ = 29376000.

The previous prime is 100215491. The next prime is 100215509. The reversal of 100215500 is 5512001.

It is an interprime number because it is at equal distance from previous prime (100215491) and next prime (100215509).

It is a Harshad number since it is a multiple of its sum of digits (14).

It is not an unprimeable number, because it can be changed into a prime (100215509) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 731432 + ... + 731568.

It is an arithmetic number, because the mean of its divisors is an integer number (1506960).

Almost surely, 2^100215500 is an apocalyptic number.

100215500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 100215500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144668160).

100215500 is an abundant number, since it is smaller than the sum of its proper divisors (189120820).

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

100215500 is a wasteful number, since it uses less digits than its factorization.

100215500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193 (or 181 counting only the distinct ones).

The product of its (nonzero) digits is 50, while the sum is 14.

The square root of 100215500 is about 10010.7692012153. The cubic root of 100215500 is about 464.4920649382.

Adding to 100215500 its reverse (5512001), we get a palindrome (105727501).

The spelling of 100215500 in words is "one hundred million, two hundred fifteen thousand, five hundred".