2555555 has 4 divisors (see below), whose sum is σ = 3066672. Its totient is φ = 2044440.

The previous prime is 2555551. The next prime is 2555561. The reversal of 2555555 is 5555552.

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

It is not a de Polignac number, because 2555555 - 2² = 2555551 is a prime.

It is a super-2 number, since 2×2555555² = 13061722716050, which contains 22 as substring.

It is a Duffinian number.

2555555 is a modest number, since divided by 5555 gives 255 as remainder.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (2555551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255551 + ... + 255560.

It is an arithmetic number, because the mean of its divisors is an integer number (766668).

2^2555555 is an apocalyptic number.

2555555 is a deficient number, since it is larger than the sum of its proper divisors (511117).

2555555 is an equidigital number, since it uses as much as digits as its factorization.

2555555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511116.

The product of its digits is 31250, while the sum is 32.

The square root of 2555555 is about 1598.6103340089. The cubic root of 2555555 is about 136.7188544162.

The spelling of 2555555 in words is "two million, five hundred fifty-five thousand, five hundred fifty-five".