5381581 has 2 divisors, whose sum is σ = 5381582. Its totient is φ = 5381580.

The previous prime is 5381573. The next prime is 5381599. The reversal of 5381581 is 1851835.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3515625 + 1865956 = 1875^2 + 1366^2 .

It is a cyclic number.

It is not a de Polignac number, because 5381581 - 2³ = 5381573 is a prime.

It is a super-2 number, since 2×5381581² = 57922828119122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5381521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2690790 + 2690791.

It is an arithmetic number, because the mean of its divisors is an integer number (2690791).

Almost surely, 2^5381581 is an apocalyptic number.

It is an amenable number.

5381581 is a deficient number, since it is larger than the sum of its proper divisors (1).

5381581 is an equidigital number, since it uses as much as digits as its factorization.

5381581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4800, while the sum is 31.

The square root of 5381581 is about 2319.8234846643. The cubic root of 5381581 is about 175.2413649089.

The spelling of 5381581 in words is "five million, three hundred eighty-one thousand, five hundred eighty-one".