2106051565 has 8 divisors (see below), whose sum is σ = 2529110808. Its totient is φ = 1683608640.

The previous prime is 2106051559. The next prime is 2106051569. The reversal of 2106051565 is 5651506012.

It can be written as a sum of positive squares in 4 ways, for example, as 413634244 + 1692417321 = 20338^2 + 41139^2 .

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

It is not a de Polignac number, because 2106051565 - 2²⁷ = 1971833837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2106051569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146526 + ... + 160255.

It is an arithmetic number, because the mean of its divisors is an integer number (316138851).

Almost surely, 2^2106051565 is an apocalyptic number.

It is an amenable number.

2106051565 is a deficient number, since it is larger than the sum of its proper divisors (423059243).

2106051565 is a wasteful number, since it uses less digits than its factorization.

2106051565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308159.

The product of its (nonzero) digits is 9000, while the sum is 31.

The square root of 2106051565 is about 45891.7374371466. The cubic root of 2106051565 is about 1281.8080659456.

Adding to 2106051565 its reverse (5651506012), we get a palindrome (7757557577).

The spelling of 2106051565 in words is "two billion, one hundred six million, fifty-one thousand, five hundred sixty-five".