5287285981 has 2 divisors, whose sum is σ = 5287285982. Its totient is φ = 5287285980.

The previous prime is 5287285963. The next prime is 5287286021. The reversal of 5287285981 is 1895827825.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4243349881 + 1043936100 = 65141^2 + 32310^2 .

It is a cyclic number.

It is not a de Polignac number, because 5287285981 - 2⁷ = 5287285853 is a prime.

It is a super-2 number, since 2×5287285981² = 55910786089758264722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5287285921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2643642990 + 2643642991.

It is an arithmetic number, because the mean of its divisors is an integer number (2643642991).

Almost surely, 2^5287285981 is an apocalyptic number.

It is an amenable number.

5287285981 is a deficient number, since it is larger than the sum of its proper divisors (1).

5287285981 is an equidigital number, since it uses as much as digits as its factorization.

5287285981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3225600, while the sum is 55.

The square root of 5287285981 is about 72713.7262213951. The cubic root of 5287285981 is about 1742.1181301027.

The spelling of 5287285981 in words is "five billion, two hundred eighty-seven million, two hundred eighty-five thousand, nine hundred eighty-one".