7251242881 has 2 divisors, whose sum is σ = 7251242882. Its totient is φ = 7251242880.

The previous prime is 7251242879. The next prime is 7251242899. The reversal of 7251242881 is 1882421527.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6617009025 + 634233856 = 81345^2 + 25184^2 .

It is a cyclic number.

It is not a de Polignac number, because 7251242881 - 2¹ = 7251242879 is a prime.

It is a super-2 number, since 2×7251242881² (a number of 21 digits) contains 22 as substring.

Together with 7251242879, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (7251242281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3625621440 + 3625621441.

It is an arithmetic number, because the mean of its divisors is an integer number (3625621441).

Almost surely, 2^7251242881 is an apocalyptic number.

It is an amenable number.

7251242881 is a deficient number, since it is larger than the sum of its proper divisors (1).

7251242881 is an equidigital number, since it uses as much as digits as its factorization.

7251242881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 71680, while the sum is 40.

The square root of 7251242881 is about 85154.2299653987. The cubic root of 7251242881 is about 1935.5489125928.

The spelling of 7251242881 in words is "seven billion, two hundred fifty-one million, two hundred forty-two thousand, eight hundred eighty-one".