2551599091 has 4 divisors (see below), whose sum is σ = 2685893800. Its totient is φ = 2417304384.

The previous prime is 2551599079. The next prime is 2551599103. The reversal of 2551599091 is 1909951552.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2551599079) and next prime (2551599103).

It is a cyclic number.

It is not a de Polignac number, because 2551599091 - 2¹¹ = 2551597043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2551599041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67147326 + ... + 67147363.

It is an arithmetic number, because the mean of its divisors is an integer number (671473450).

Almost surely, 2^2551599091 is an apocalyptic number.

2551599091 is a deficient number, since it is larger than the sum of its proper divisors (134294709).

2551599091 is a wasteful number, since it uses less digits than its factorization.

2551599091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134294708.

The product of its (nonzero) digits is 182250, while the sum is 46.

The square root of 2551599091 is about 50513.3555705815. The cubic root of 2551599091 is about 1366.4827266293.

The spelling of 2551599091 in words is "two billion, five hundred fifty-one million, five hundred ninety-nine thousand, ninety-one".