3101566561 has 4 divisors (see below), whose sum is σ = 3133541572. Its totient is φ = 3069591552.

The previous prime is 3101566553. The next prime is 3101566697. The reversal of 3101566561 is 1656651013.

3101566561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 916938961 + 2184627600 = 30281^2 + 46740^2 .

It is a cyclic number.

It is not a de Polignac number, because 3101566561 - 2³ = 3101566553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3101566861) 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, 15987360 + ... + 15987553.

It is an arithmetic number, because the mean of its divisors is an integer number (783385393).

Almost surely, 2^3101566561 is an apocalyptic number.

It is an amenable number.

3101566561 is a deficient number, since it is larger than the sum of its proper divisors (31975011).

3101566561 is an equidigital number, since it uses as much as digits as its factorization.

3101566561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31975010.

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 3101566561 is about 55691.7099845210. The cubic root of 3101566561 is about 1458.3453076031.

The spelling of 3101566561 in words is "three billion, one hundred one million, five hundred sixty-six thousand, five hundred sixty-one".