100036581 has 4 divisors (see below), whose sum is σ = 133382112. Its totient is φ = 66691052.

The previous prime is 100036579. The next prime is 100036583. The reversal of 100036581 is 185630001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (100036579) and next prime (100036583).

It is a cyclic number.

It is not a de Polignac number, because 100036581 - 2¹ = 100036579 is a prime.

It is a super-2 number, since 2×100036581² = 20014635076339122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100036583) by changing a digit.

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, 16672761 + ... + 16672766.

It is an arithmetic number, because the mean of its divisors is an integer number (33345528).

Almost surely, 2^100036581 is an apocalyptic number.

It is an amenable number.

100036581 is a deficient number, since it is larger than the sum of its proper divisors (33345531).

100036581 is an equidigital number, since it uses as much as digits as its factorization.

100036581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33345530.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 100036581 is about 10001.8288827594. The cubic root of 100036581 is about 464.2154744484.

Adding to 100036581 its reverse (185630001), we get a palindrome (285666582).

The spelling of 100036581 in words is "one hundred million, thirty-six thousand, five hundred eighty-one".