100561135 has 4 divisors (see below), whose sum is σ = 120673368. Its totient is φ = 80448904.

The previous prime is 100561099. The next prime is 100561147. The reversal of 100561135 is 531165001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 100561135 - 2⁷ = 100561007 is a prime.

It is a super-2 number, since 2×100561135² = 20225083744976450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10056109 + ... + 10056118.

It is an arithmetic number, because the mean of its divisors is an integer number (30168342).

Almost surely, 2^100561135 is an apocalyptic number.

100561135 is a deficient number, since it is larger than the sum of its proper divisors (20112233).

100561135 is an equidigital number, since it uses as much as digits as its factorization.

100561135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20112232.

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 100561135 is about 10028.0175009819. The cubic root of 100561135 is about 465.0254504897.

The spelling of 100561135 in words is "one hundred million, five hundred sixty-one thousand, one hundred thirty-five".