100000215 has 48 divisors (see below), whose sum is σ = 198801408. Its totient is φ = 45551808.

The previous prime is 100000213. The next prime is 100000217. The reversal of 100000215 is 512000001.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (100000213) and next prime (100000217).

It is not a de Polignac number, because 100000215 - 2¹ = 100000213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 100000197 and 100000206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100000213) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 164442 + ... + 165048.

It is an arithmetic number, because the mean of its divisors is an integer number (4141696).

Almost surely, 2^100000215 is an apocalyptic number.

100000215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

100000215 is a deficient number, since it is larger than the sum of its proper divisors (98801193).

100000215 is a wasteful number, since it uses less digits than its factorization.

100000215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1148 (or 1145 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 9.

The square root of 100000215 is about 10000.0107499942. The cubic root of 100000215 is about 464.1592160082.

Adding to 100000215 its reverse (512000001), we get a palindrome (612000216).

The spelling of 100000215 in words is "one hundred million, two hundred fifteen", and thus it is an aban number.