2555281381 has 2 divisors, whose sum is σ = 2555281382. Its totient is φ = 2555281380.

The previous prime is 2555281319. The next prime is 2555281387. The reversal of 2555281381 is 1831825552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1985504481 + 569776900 = 44559^2 + 23870^2 .

It is a cyclic number.

It is not a de Polignac number, because 2555281381 - 2²¹ = 2553184229 is a prime.

It is a super-2 number, since 2×2555281381² = 13058925872170534322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2555281387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1277640690 + 1277640691.

It is an arithmetic number, because the mean of its divisors is an integer number (1277640691).

Almost surely, 2^2555281381 is an apocalyptic number.

It is an amenable number.

2555281381 is a deficient number, since it is larger than the sum of its proper divisors (1).

2555281381 is an equidigital number, since it uses as much as digits as its factorization.

2555281381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96000, while the sum is 40.

The square root of 2555281381 is about 50549.7911073824. The cubic root of 2555281381 is about 1367.1397482239.

The spelling of 2555281381 in words is "two billion, five hundred fifty-five million, two hundred eighty-one thousand, three hundred eighty-one".