2555215655 has 4 divisors (see below), whose sum is σ = 3066258792. Its totient is φ = 2044172520.

The previous prime is 2555215631. The next prime is 2555215679. The reversal of 2555215655 is 5565125552.

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 (2555215631) and next prime (2555215679).

It is not a de Polignac number, because 2555215655 - 2¹⁶ = 2555150119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255521561 + ... + 255521570.

It is an arithmetic number, because the mean of its divisors is an integer number (766564698).

Almost surely, 2^2555215655 is an apocalyptic number.

2555215655 is a deficient number, since it is larger than the sum of its proper divisors (511043137).

2555215655 is an equidigital number, since it uses as much as digits as its factorization.

2555215655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511043136.

The product of its digits is 375000, while the sum is 41.

The square root of 2555215655 is about 50549.1409917122. The cubic root of 2555215655 is about 1367.1280264362.

The spelling of 2555215655 in words is "two billion, five hundred fifty-five million, two hundred fifteen thousand, six hundred fifty-five".