100215155 has 16 divisors (see below), whose sum is σ = 127306080. Its totient is φ = 75602688.

The previous prime is 100215149. The next prime is 100215161. The reversal of 100215155 is 551512001.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (100215149) and next prime (100215161).

It is a cyclic number.

It is not a de Polignac number, because 100215155 - 2⁸ = 100214899 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1802 + ... + 14271.

It is an arithmetic number, because the mean of its divisors is an integer number (7956630).

Almost surely, 2^100215155 is an apocalyptic number.

100215155 is a deficient number, since it is larger than the sum of its proper divisors (27090925).

100215155 is a wasteful number, since it uses less digits than its factorization.

100215155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16150.

The product of its (nonzero) digits is 250, while the sum is 20.

The square root of 100215155 is about 10010.7519697573. The cubic root of 100215155 is about 464.4915319204.

Adding to 100215155 its reverse (551512001), we get a palindrome (651727156).

The spelling of 100215155 in words is "one hundred million, two hundred fifteen thousand, one hundred fifty-five".