2525005249981 has 2 divisors, whose sum is σ = 2525005249982. Its totient is φ = 2525005249980.

The previous prime is 2525005249969. The next prime is 2525005250051. The reversal of 2525005249981 is 1899425005252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2386688201881 + 138317048100 = 1544891^2 + 371910^2 .

It is a cyclic number.

It is not a de Polignac number, because 2525005249981 - 2⁷ = 2525005249853 is a prime.

It is a super-2 number, since 2×2525005249981² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2525005249951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1262502624990 + 1262502624991.

It is an arithmetic number, because the mean of its divisors is an integer number (1262502624991).

Almost surely, 2^{2525005249981} is an apocalyptic number.

It is an amenable number.

2525005249981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2525005249981 is an equidigital number, since it uses as much as digits as its factorization.

2525005249981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592000, while the sum is 52.

The spelling of 2525005249981 in words is "two trillion, five hundred twenty-five billion, five million, two hundred forty-nine thousand, nine hundred eighty-one".