2555220331 has 2 divisors, whose sum is σ = 2555220332. Its totient is φ = 2555220330.

The previous prime is 2555220313. The next prime is 2555220337. The reversal of 2555220331 is 1330225552.

Together with previous prime (2555220313) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2555220331 - 2¹⁵ = 2555187563 is a prime.

It is a super-2 number, since 2×2555220331² = 13058301879911499122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2555220331.

It is not a weakly prime, because it can be changed into another prime (2555220337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1277610165 + 1277610166.

It is an arithmetic number, because the mean of its divisors is an integer number (1277610166).

Almost surely, 2^2555220331 is an apocalyptic number.

2555220331 is a deficient number, since it is larger than the sum of its proper divisors (1).

2555220331 is an equidigital number, since it uses as much as digits as its factorization.

2555220331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 2555220331 is about 50549.1872437134. The cubic root of 2555220331 is about 1367.1288603759.

Adding to 2555220331 its reverse (1330225552), we get a palindrome (3885445883).

The spelling of 2555220331 in words is "two billion, five hundred fifty-five million, two hundred twenty thousand, three hundred thirty-one".