2000161265 has 8 divisors (see below), whose sum is σ = 2541381480. Its totient is φ = 1506003712.

The previous prime is 2000161193. The next prime is 2000161271. The reversal of 2000161265 is 5621610002.

It can be written as a sum of positive squares in 4 ways, for example, as 470412721 + 1529748544 = 21689^2 + 39112^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2000161265 - 2¹⁶ = 2000095729 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2000161265.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11765570 + ... + 11765739.

It is an arithmetic number, because the mean of its divisors is an integer number (317672685).

Almost surely, 2^2000161265 is an apocalyptic number.

It is an amenable number.

2000161265 is a deficient number, since it is larger than the sum of its proper divisors (541220215).

2000161265 is a wasteful number, since it uses less digits than its factorization.

2000161265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23531331.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 2000161265 is about 44723.1625111642. The cubic root of 2000161265 is about 1259.9549125128.

Adding to 2000161265 its reverse (5621610002), we get a palindrome (7621771267).

The spelling of 2000161265 in words is "two billion, one hundred sixty-one thousand, two hundred sixty-five".