2551244565 has 16 divisors (see below), whose sum is σ = 4133664000. Its totient is φ = 1343439552.

The previous prime is 2551244561. The next prime is 2551244569. The reversal of 2551244565 is 5654421552.

It is an interprime number because it is at equal distance from previous prime (2551244561) and next prime (2551244569).

It is not a de Polignac number, because 2551244565 - 2² = 2551244561 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2551244561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1075290 + ... + 1077659.

It is an arithmetic number, because the mean of its divisors is an integer number (258354000).

Almost surely, 2^2551244565 is an apocalyptic number.

It is an amenable number.

2551244565 is a deficient number, since it is larger than the sum of its proper divisors (1582419435).

2551244565 is a wasteful number, since it uses less digits than its factorization.

2551244565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2153036.

The product of its digits is 240000, while the sum is 39.

The square root of 2551244565 is about 50509.8462183365. The cubic root of 2551244565 is about 1366.4194361101.

The spelling of 2551244565 in words is "two billion, five hundred fifty-one million, two hundred forty-four thousand, five hundred sixty-five".