5286721381 has 2 divisors, whose sum is σ = 5286721382. Its totient is φ = 5286721380.

The previous prime is 5286721339. The next prime is 5286721399. The reversal of 5286721381 is 1831276825.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3087580356 + 2199141025 = 55566^2 + 46895^2 .

It is a cyclic number.

It is not a de Polignac number, because 5286721381 - 2¹⁹ = 5286197093 is a prime.

It is a super-2 number, since 2×5286721381² = 55898845920645094322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5286721331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2643360690 + 2643360691.

It is an arithmetic number, because the mean of its divisors is an integer number (2643360691).

Almost surely, 2^5286721381 is an apocalyptic number.

It is an amenable number.

5286721381 is a deficient number, since it is larger than the sum of its proper divisors (1).

5286721381 is an equidigital number, since it uses as much as digits as its factorization.

5286721381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 43.

The square root of 5286721381 is about 72709.8437696025. The cubic root of 5286721381 is about 1742.0561175117.

The spelling of 5286721381 in words is "five billion, two hundred eighty-six million, seven hundred twenty-one thousand, three hundred eighty-one".