250028305781 has 2 divisors, whose sum is σ = 250028305782. Its totient is φ = 250028305780.

The previous prime is 250028305763. The next prime is 250028305831. The reversal of 250028305781 is 187503820052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 158615806756 + 91412499025 = 398266^2 + 302345^2 .

It is a cyclic number.

It is not a de Polignac number, because 250028305781 - 2¹⁴ = 250028289397 is a prime.

It is a super-2 number, since 2×250028305781² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (250028305721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125014152890 + 125014152891.

It is an arithmetic number, because the mean of its divisors is an integer number (125014152891).

Almost surely, 2^250028305781 is an apocalyptic number.

It is an amenable number.

250028305781 is a deficient number, since it is larger than the sum of its proper divisors (1).

250028305781 is an equidigital number, since it uses as much as digits as its factorization.

250028305781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 134400, while the sum is 41.

The spelling of 250028305781 in words is "two hundred fifty billion, twenty-eight million, three hundred five thousand, seven hundred eighty-one".