5351581 has 2 divisors, whose sum is σ = 5351582. Its totient is φ = 5351580.

The previous prime is 5351579. The next prime is 5351603. The reversal of 5351581 is 1851535.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2775556 + 2576025 = 1666^2 + 1605^2 .

It is a cyclic number.

It is not a de Polignac number, because 5351581 - 2¹ = 5351579 is a prime.

It is a super-2 number, since 2×5351581² = 57278838399122, which contains 22 as substring.

Together with 5351579, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5351531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2675790 + 2675791.

It is an arithmetic number, because the mean of its divisors is an integer number (2675791).

Almost surely, 2^5351581 is an apocalyptic number.

It is an amenable number.

5351581 is a deficient number, since it is larger than the sum of its proper divisors (1).

5351581 is an equidigital number, since it uses as much as digits as its factorization.

5351581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3000, while the sum is 28.

The square root of 5351581 is about 2313.3484389516. The cubic root of 5351581 is about 174.9151261904.

It can be divided in two parts, 535 and 1581, that added together give a square (2116 = 46²).

The spelling of 5351581 in words is "five million, three hundred fifty-one thousand, five hundred eighty-one".