255529381 has 2 divisors, whose sum is σ = 255529382. Its totient is φ = 255529380.

The previous prime is 255529319. The next prime is 255529403. The reversal of 255529381 is 183925552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 254913156 + 616225 = 15966^2 + 785^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255529381 is a prime.

It is a super-2 number, since 2×255529381² = 130590529108486322, 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 (255520381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127764690 + 127764691.

It is an arithmetic number, because the mean of its divisors is an integer number (127764691).

Almost surely, 2^255529381 is an apocalyptic number.

It is an amenable number.

255529381 is a deficient number, since it is larger than the sum of its proper divisors (1).

255529381 is an equidigital number, since it uses as much as digits as its factorization.

255529381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108000, while the sum is 40.

The square root of 255529381 is about 15985.2863909284. The cubic root of 255529381 is about 634.5710877916.

The spelling of 255529381 in words is "two hundred fifty-five million, five hundred twenty-nine thousand, three hundred eighty-one".