100068561 has 16 divisors (see below), whose sum is σ = 154696320. Its totient is φ = 63811440.

The previous prime is 100068559. The next prime is 100068569. The reversal of 100068561 is 165860001.

It is not a de Polignac number, because 100068561 - 2¹ = 100068559 is a prime.

It is a super-2 number, since 2×100068561² = 20027433801221442, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (100068569) 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 15 ways as a sum of consecutive naturals, for example, 79950 + ... + 81191.

It is an arithmetic number, because the mean of its divisors is an integer number (9668520).

Almost surely, 2^100068561 is an apocalyptic number.

It is an amenable number.

100068561 is a deficient number, since it is larger than the sum of its proper divisors (54627759).

100068561 is a wasteful number, since it uses less digits than its factorization.

100068561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161173 (or 161167 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 100068561 is about 10003.4274626250. The cubic root of 100068561 is about 464.2649364520.

Adding to 100068561 its product of nonzero digits (1440), we get a palindrome (100070001).

The spelling of 100068561 in words is "one hundred million, sixty-eight thousand, five hundred sixty-one".