100555091 has 16 divisors (see below), whose sum is σ = 125463744. Its totient is φ = 78465024.

The previous prime is 100555073. The next prime is 100555097. The reversal of 100555091 is 190555001.

It is a cyclic number.

It is not a de Polignac number, because 100555091 - 2¹⁸ = 100292947 is a prime.

It is a super-2 number, since 2×100555091² = 20222652652036562, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 100555091.

It is not an unprimeable number, because it can be changed into a prime (100555097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 926 + ... + 14211.

It is an arithmetic number, because the mean of its divisors is an integer number (7841484).

Almost surely, 2^100555091 is an apocalyptic number.

100555091 is a deficient number, since it is larger than the sum of its proper divisors (24908653).

100555091 is a wasteful number, since it uses less digits than its factorization.

100555091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15230.

The product of its (nonzero) digits is 1125, while the sum is 26.

The square root of 100555091 is about 10027.7161407770. The cubic root of 100555091 is about 465.0161338681.

The spelling of 100555091 in words is "one hundred million, five hundred fifty-five thousand, ninety-one".