2555535221 has 4 divisors (see below), whose sum is σ = 2666645472. Its totient is φ = 2444424972.

The previous prime is 2555535209. The next prime is 2555535247. The reversal of 2555535221 is 1225355552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2555535221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2555535271) 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, 55555091 + ... + 55555136.

It is an arithmetic number, because the mean of its divisors is an integer number (666661368).

Almost surely, 2^2555535221 is an apocalyptic number.

It is an amenable number.

2555535221 is a deficient number, since it is larger than the sum of its proper divisors (111110251).

2555535221 is a wasteful number, since it uses less digits than its factorization.

2555535221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111110250.

The product of its digits is 75000, while the sum is 35.

The square root of 2555535221 is about 50552.3018368106. The cubic root of 2555535221 is about 1367.1850169845.

The spelling of 2555535221 in words is "two billion, five hundred fifty-five million, five hundred thirty-five thousand, two hundred twenty-one".