100056891 has 16 divisors (see below), whose sum is σ = 146285568. Its totient is φ = 60328800.

The previous prime is 100056839. The next prime is 100056893. The reversal of 100056891 is 198650001.

It is a happy number.

It is not a de Polignac number, because 100056891 - 2¹⁵ = 100024123 is a prime.

It is a super-2 number, since 2×100056891² = 20022762873171762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (100056893) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1195 + ... + 14196.

It is an arithmetic number, because the mean of its divisors is an integer number (9142848).

Almost surely, 2^100056891 is an apocalyptic number.

100056891 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

100056891 is a deficient number, since it is larger than the sum of its proper divisors (46228677).

100056891 is a wasteful number, since it uses less digits than its factorization.

100056891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15602.

The product of its (nonzero) digits is 2160, while the sum is 30.

The square root of 100056891 is about 10002.8441455418. The cubic root of 100056891 is about 464.2468882179.

The spelling of 100056891 in words is "one hundred million, fifty-six thousand, eight hundred ninety-one".