2591655 has 32 divisors (see below), whose sum is σ = 4596480. Its totient is φ = 1236480.

The previous prime is 2591623. The next prime is 2591669. The reversal of 2591655 is 5561952.

It is not a de Polignac number, because 2591655 - 2⁵ = 2591623 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 18576 + ... + 18714.

It is an arithmetic number, because the mean of its divisors is an integer number (143640).

2^2591655 is an apocalyptic number.

2591655 is a deficient number, since it is larger than the sum of its proper divisors (2004825).

2591655 is a wasteful number, since it uses less digits than its factorization.

2591655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271.

The product of its digits is 13500, while the sum is 33.

The square root of 2591655 is about 1609.8617953104. The cubic root of 2591655 is about 137.3596142926.

The spelling of 2591655 in words is "two million, five hundred ninety-one thousand, six hundred fifty-five".