2130247565 has 4 divisors (see below), whose sum is σ = 2556297084. Its totient is φ = 1704198048.

The previous prime is 2130247549. The next prime is 2130247579. The reversal of 2130247565 is 5657420312.

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 899220169 + 1231027396 = 29987^2 + 35086^2 .

It is a cyclic number.

It is not a de Polignac number, because 2130247565 - 2⁴ = 2130247549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213024752 + ... + 213024761.

It is an arithmetic number, because the mean of its divisors is an integer number (639074271).

Almost surely, 2^2130247565 is an apocalyptic number.

It is an amenable number.

2130247565 is a deficient number, since it is larger than the sum of its proper divisors (426049519).

2130247565 is an equidigital number, since it uses as much as digits as its factorization.

2130247565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426049518.

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 2130247565 is about 46154.6050248510. The cubic root of 2130247565 is about 1286.6981973519.

Adding to 2130247565 its reverse (5657420312), we get a palindrome (7787667877).

The spelling of 2130247565 in words is "two billion, one hundred thirty million, two hundred forty-seven thousand, five hundred sixty-five".