100055591 has 4 divisors (see below), whose sum is σ = 105941232. Its totient is φ = 94169952.

The previous prime is 100055561. The next prime is 100055623. The reversal of 100055591 is 195550001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 195550001 = 5701 ⋅34301.

It is a cyclic number.

It is not a de Polignac number, because 100055591 - 2¹⁰ = 100054567 is a prime.

It is a super-2 number, since 2×100055591² = 20022242580718562, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 100055591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100055531) 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 3 ways as a sum of consecutive naturals, for example, 2942795 + ... + 2942828.

It is an arithmetic number, because the mean of its divisors is an integer number (26485308).

Almost surely, 2^100055591 is an apocalyptic number.

100055591 is a deficient number, since it is larger than the sum of its proper divisors (5885641).

100055591 is an equidigital number, since it uses as much as digits as its factorization.

100055591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5885640.

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

The square root of 100055591 is about 10002.7791638124. The cubic root of 100055591 is about 464.2448776165.

The spelling of 100055591 in words is "one hundred million, fifty-five thousand, five hundred ninety-one".