5291351581 has 2 divisors, whose sum is σ = 5291351582. Its totient is φ = 5291351580.

The previous prime is 5291351573. The next prime is 5291351617. The reversal of 5291351581 is 1851531925.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5205622500 + 85729081 = 72150^2 + 9259^2 .

It is a cyclic number.

It is not a de Polignac number, because 5291351581 - 2³ = 5291351573 is a prime.

It is a super-2 number, since 2×5291351581² = 55996803107502399122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5291351081) 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, 2645675790 + 2645675791.

It is an arithmetic number, because the mean of its divisors is an integer number (2645675791).

Almost surely, 2^5291351581 is an apocalyptic number.

It is an amenable number.

5291351581 is a deficient number, since it is larger than the sum of its proper divisors (1).

5291351581 is an equidigital number, since it uses as much as digits as its factorization.

5291351581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54000, while the sum is 40.

The square root of 5291351581 is about 72741.6770565540. The cubic root of 5291351581 is about 1742.5645431817.

The spelling of 5291351581 in words is "five billion, two hundred ninety-one million, three hundred fifty-one thousand, five hundred eighty-one".