100605155 has 16 divisors (see below), whose sum is σ = 139527360. Its totient is φ = 68209152.

The previous prime is 100605149. The next prime is 100605163. The reversal of 100605155 is 551506001.

It is a cyclic number.

It is not a de Polignac number, because 100605155 - 2⁴ = 100605139 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100605155.

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, 13034 + ... + 19263.

It is an arithmetic number, because the mean of its divisors is an integer number (8720460).

Almost surely, 2^100605155 is an apocalyptic number.

100605155 is a deficient number, since it is larger than the sum of its proper divisors (38922205).

100605155 is an equidigital number, since it uses as much as digits as its factorization.

100605155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32398.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 100605155 is about 10030.2121114162. The cubic root of 100605155 is about 465.0932945732.

The spelling of 100605155 in words is "one hundred million, six hundred five thousand, one hundred fifty-five".