2556210155 has 4 divisors (see below), whose sum is σ = 3067452192. Its totient is φ = 2044968120.

The previous prime is 2556210127. The next prime is 2556210161. The reversal of 2556210155 is 5510126552.

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

It is a de Polignac number, because none of the positive numbers 2^k-2556210155 is a prime.

It is a Duffinian 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, 255621011 + ... + 255621020.

It is an arithmetic number, because the mean of its divisors is an integer number (766863048).

Almost surely, 2^2556210155 is an apocalyptic number.

2556210155 is a deficient number, since it is larger than the sum of its proper divisors (511242037).

2556210155 is an equidigital number, since it uses as much as digits as its factorization.

2556210155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511242036.

The product of its (nonzero) digits is 15000, while the sum is 32.

The square root of 2556210155 is about 50558.9769971664. The cubic root of 2556210155 is about 1367.3053673024.

The spelling of 2556210155 in words is "two billion, five hundred fifty-six million, two hundred ten thousand, one hundred fifty-five".