5240450981 has 2 divisors, whose sum is σ = 5240450982. Its totient is φ = 5240450980.

The previous prime is 5240450959. The next prime is 5240450983. The reversal of 5240450981 is 1890540425.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3068052100 + 2172398881 = 55390^2 + 46609^2 .

It is a cyclic number.

It is not a de Polignac number, because 5240450981 - 2¹⁴ = 5240434597 is a prime.

It is a super-2 number, since 2×5240450981² = 54924652968527724722, which contains 22 as substring.

Together with 5240450983, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5240450983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2620225490 + 2620225491.

It is an arithmetic number, because the mean of its divisors is an integer number (2620225491).

Almost surely, 2^5240450981 is an apocalyptic number.

It is an amenable number.

5240450981 is a deficient number, since it is larger than the sum of its proper divisors (1).

5240450981 is an equidigital number, since it uses as much as digits as its factorization.

5240450981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 57600, while the sum is 38.

The square root of 5240450981 is about 72390.9592490665. The cubic root of 5240450981 is about 1736.9589481860.

The spelling of 5240450981 in words is "five billion, two hundred forty million, four hundred fifty thousand, nine hundred eighty-one".