255030499981 has 2 divisors, whose sum is σ = 255030499982. Its totient is φ = 255030499980.

The previous prime is 255030499979. The next prime is 255030500047. The reversal of 255030499981 is 189994030552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161415918756 + 93614581225 = 401766^2 + 305965^2 .

It is a cyclic number.

It is not a de Polignac number, because 255030499981 - 2¹ = 255030499979 is a prime.

It is a super-2 number, since 2×255030499981² (a number of 24 digits) contains 22 as substring.

Together with 255030499979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255030499931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127515249990 + 127515249991.

It is an arithmetic number, because the mean of its divisors is an integer number (127515249991).

Almost surely, 2^255030499981 is an apocalyptic number.

It is an amenable number.

255030499981 is a deficient number, since it is larger than the sum of its proper divisors (1).

255030499981 is an equidigital number, since it uses as much as digits as its factorization.

255030499981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3499200, while the sum is 55.

The spelling of 255030499981 in words is "two hundred fifty-five billion, thirty million, four hundred ninety-nine thousand, nine hundred eighty-one".