255310987 has 2 divisors, whose sum is σ = 255310988. Its totient is φ = 255310986.

The previous prime is 255310969. The next prime is 255311051. The reversal of 255310987 is 789013552.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255310987 is a prime.

It is not a weakly prime, because it can be changed into another prime (255310907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127655493 + 127655494.

It is an arithmetic number, because the mean of its divisors is an integer number (127655494).

Almost surely, 2^255310987 is an apocalyptic number.

255310987 is a deficient number, since it is larger than the sum of its proper divisors (1).

255310987 is an equidigital number, since it uses as much as digits as its factorization.

255310987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75600, while the sum is 40.

The square root of 255310987 is about 15978.4538363385. The cubic root of 255310987 is about 634.3902527236.

The spelling of 255310987 in words is "two hundred fifty-five million, three hundred ten thousand, nine hundred eighty-seven".