100215045 has 72 divisors (see below), whose sum is σ = 206578944. Its totient is φ = 44791488.

The previous prime is 100215019. The next prime is 100215047. The reversal of 100215045 is 540512001.

It is not a de Polignac number, because 100215045 - 2⁹ = 100214533 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100215047) 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 71 ways as a sum of consecutive naturals, for example, 103152 + ... + 104118.

It is an arithmetic number, because the mean of its divisors is an integer number (2869152).

Almost surely, 2^100215045 is an apocalyptic number.

100215045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

100215045 is an abundant number, since it is smaller than the sum of its proper divisors (106363899).

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

100215045 is a wasteful number, since it uses less digits than its factorization.

100215045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1039 (or 1029 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 100215045 is about 10010.7464756630. The cubic root of 100215045 is about 464.4913619724.

Adding to 100215045 its reverse (540512001), we get a palindrome (640727046).

The spelling of 100215045 in words is "one hundred million, two hundred fifteen thousand, forty-five".