2131049565 has 12 divisors (see below), whose sum is σ = 3693819324. Its totient is φ = 1136559744.

The previous prime is 2131049563. The next prime is 2131049581. The reversal of 2131049565 is 5659401312.

2131049565 is a `hidden beast` number, since 21 + 31 + 0 + 49 + 565 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 798288516 + 1332761049 = 28254^2 + 36507^2 .

It is not a de Polignac number, because 2131049565 - 2¹ = 2131049563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131049563) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23678284 + ... + 23678373.

It is an arithmetic number, because the mean of its divisors is an integer number (307818277).

Almost surely, 2^2131049565 is an apocalyptic number.

It is an amenable number.

2131049565 is a deficient number, since it is larger than the sum of its proper divisors (1562769759).

2131049565 is a wasteful number, since it uses less digits than its factorization.

2131049565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47356668 (or 47356665 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 2131049565 is about 46163.2923977482. The cubic root of 2131049565 is about 1286.8596500233.

The spelling of 2131049565 in words is "two billion, one hundred thirty-one million, forty-nine thousand, five hundred sixty-five".