250128881 has 2 divisors, whose sum is σ = 250128882. Its totient is φ = 250128880.

The previous prime is 250128859. The next prime is 250128937. The reversal of 250128881 is 188821052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134351281 + 115777600 = 11591^2 + 10760^2 .

It is a cyclic number.

It is not a de Polignac number, because 250128881 - 2¹⁸ = 249866737 is a prime.

It is a super-2 number, since 2×250128881² = 125128914220624322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (250128481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125064440 + 125064441.

It is an arithmetic number, because the mean of its divisors is an integer number (125064441).

Almost surely, 2^250128881 is an apocalyptic number.

It is an amenable number.

250128881 is a deficient number, since it is larger than the sum of its proper divisors (1).

250128881 is an equidigital number, since it uses as much as digits as its factorization.

250128881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10240, while the sum is 35.

The square root of 250128881 is about 15815.4633507843. The cubic root of 250128881 is about 630.0687596069.

The spelling of 250128881 in words is "two hundred fifty million, one hundred twenty-eight thousand, eight hundred eighty-one".