65102161 has 4 divisors (see below), whose sum is σ = 65126052. Its totient is φ = 65078272.

The previous prime is 65102143. The next prime is 65102171. The reversal of 65102161 is 16120156.

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 49617936 + 15484225 = 7044^2 + 3935^2 .

It is a cyclic number.

It is not a de Polignac number, because 65102161 - 2⁷ = 65102033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65102171) 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, 7240 + ... + 13513.

It is an arithmetic number, because the mean of its divisors is an integer number (16281513).

Almost surely, 2^65102161 is an apocalyptic number.

It is an amenable number.

65102161 is a deficient number, since it is larger than the sum of its proper divisors (23891).

65102161 is a wasteful number, since it uses less digits than its factorization.

65102161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23890.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 65102161 is about 8068.5910170240. The cubic root of 65102161 is about 402.2831124502.

The spelling of 65102161 in words is "sixty-five million, one hundred two thousand, one hundred sixty-one".