255245381 has 2 divisors, whose sum is σ = 255245382. Its totient is φ = 255245380.

The previous prime is 255245357. The next prime is 255245399. The reversal of 255245381 is 183542552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 230584225 + 24661156 = 15185^2 + 4966^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255245381 is a prime.

It is a super-2 number, since 2×255245381² = 130300409043670322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255245311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127622690 + 127622691.

It is an arithmetic number, because the mean of its divisors is an integer number (127622691).

Almost surely, 2^255245381 is an apocalyptic number.

It is an amenable number.

255245381 is a deficient number, since it is larger than the sum of its proper divisors (1).

255245381 is an equidigital number, since it uses as much as digits as its factorization.

255245381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48000, while the sum is 35.

The square root of 255245381 is about 15976.4007523597. The cubic root of 255245381 is about 634.3359093613.

The spelling of 255245381 in words is "two hundred fifty-five million, two hundred forty-five thousand, three hundred eighty-one".