100561601 has 4 divisors (see below), whose sum is σ = 114927552. Its totient is φ = 86195652.

The previous prime is 100561553. The next prime is 100561607. The reversal of 100561601 is 106165001.

It is a happy number.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100561601 is a prime.

It is a super-2 number, since 2×100561601² = 20225271191366402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100561607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7182965 + ... + 7182978.

It is an arithmetic number, because the mean of its divisors is an integer number (28731888).

Almost surely, 2^100561601 is an apocalyptic number.

It is an amenable number.

100561601 is a deficient number, since it is larger than the sum of its proper divisors (14365951).

100561601 is an equidigital number, since it uses as much as digits as its factorization.

100561601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14365950.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 100561601 is about 10028.0407358566. The cubic root of 100561601 is about 465.0261687974.

The spelling of 100561601 in words is "one hundred million, five hundred sixty-one thousand, six hundred one".