101565161 has 4 divisors (see below), whose sum is σ = 101595732. Its totient is φ = 101534592.

The previous prime is 101565151. The next prime is 101565179. The reversal of 101565161 is 161565101.

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 16556761 + 85008400 = 4069^2 + 9220^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101565161 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 101565161.

It is not an unprimeable number, because it can be changed into a prime (101565151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9596 + ... + 17181.

It is an arithmetic number, because the mean of its divisors is an integer number (25398933).

Almost surely, 2^101565161 is an apocalyptic number.

It is an amenable number.

101565161 is a deficient number, since it is larger than the sum of its proper divisors (30571).

101565161 is an equidigital number, since it uses as much as digits as its factorization.

101565161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30570.

The product of its (nonzero) digits is 900, while the sum is 26.

The square root of 101565161 is about 10077.9542070799. The cubic root of 101565161 is about 466.5679693203.

The spelling of 101565161 in words is "one hundred one million, five hundred sixty-five thousand, one hundred sixty-one".