2555315221 has 4 divisors (see below), whose sum is σ = 2555416332. Its totient is φ = 2555214112.

The previous prime is 2555315219. The next prime is 2555315233. The reversal of 2555315221 is 1225135552.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 297735025 + 2257580196 = 17255^2 + 47514^2 .

It is a cyclic number.

It is not a de Polignac number, because 2555315221 - 2¹ = 2555315219 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 (2555315261) 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, 24225 + ... + 75481.

It is an arithmetic number, because the mean of its divisors is an integer number (638854083).

Almost surely, 2^2555315221 is an apocalyptic number.

It is an amenable number.

2555315221 is a deficient number, since it is larger than the sum of its proper divisors (101111).

2555315221 is an equidigital number, since it uses as much as digits as its factorization.

2555315221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101110.

The product of its digits is 15000, while the sum is 31.

The square root of 2555315221 is about 50550.1258257583. The cubic root of 2555315221 is about 1367.1457832807.

The spelling of 2555315221 in words is "two billion, five hundred fifty-five million, three hundred fifteen thousand, two hundred twenty-one".