255313381 has 2 divisors, whose sum is σ = 255313382. Its totient is φ = 255313380.

The previous prime is 255313291. The next prime is 255313391. The reversal of 255313381 is 183313552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 240560100 + 14753281 = 15510^2 + 3841^2 .

It is a cyclic number.

It is not a de Polignac number, because 255313381 - 2¹³ = 255305189 is a prime.

It is a super-2 number, since 2×255313381² = 130369845035302322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255313391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127656690 + 127656691.

It is an arithmetic number, because the mean of its divisors is an integer number (127656691).

Almost surely, 2^255313381 is an apocalyptic number.

It is an amenable number.

255313381 is a deficient number, since it is larger than the sum of its proper divisors (1).

255313381 is an equidigital number, since it uses as much as digits as its factorization.

255313381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800, while the sum is 31.

The square root of 255313381 is about 15978.5287495439. The cubic root of 255313381 is about 634.3922355675.

The spelling of 255313381 in words is "two hundred fifty-five million, three hundred thirteen thousand, three hundred eighty-one".