100317561 has 8 divisors (see below), whose sum is σ = 141624864. Its totient is φ = 62944320.

The previous prime is 100317521. The next prime is 100317563. The reversal of 100317561 is 165713001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 100317561 - 2⁷ = 100317433 is a prime.

It is a super-2 number, since 2×100317561² = 20127226089977442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (100317563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 983455 + ... + 983556.

It is an arithmetic number, because the mean of its divisors is an integer number (17703108).

Almost surely, 2^100317561 is an apocalyptic number.

It is an amenable number.

100317561 is a deficient number, since it is larger than the sum of its proper divisors (41307303).

100317561 is a wasteful number, since it uses less digits than its factorization.

100317561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1967031.

The product of its (nonzero) digits is 630, while the sum is 24.

The square root of 100317561 is about 10015.8654643520. The cubic root of 100317561 is about 464.6496933841.

It can be divided in two parts, 1003175 and 61, that added together give a triangular number (1003236 = T₁₄₁₆).

The spelling of 100317561 in words is "one hundred million, three hundred seventeen thousand, five hundred sixty-one".