5715581 has 4 divisors (see below), whose sum is σ = 5912700. Its totient is φ = 5518464.

The previous prime is 5715557. The next prime is 5715583. The reversal of 5715581 is 1855175.

5715581 = 1690² + 1691².

It is a happy number.

5715581 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2856100 + 2859481 = 1690^2 + 1691^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5715581 is a prime.

It is a super-2 number, since 2×5715581² = 65335732335122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5715583) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98516 + ... + 98573.

It is an arithmetic number, because the mean of its divisors is an integer number (1478175).

Almost surely, 2^5715581 is an apocalyptic number.

5715581 is the 1691-st centered square number.

It is an amenable number.

5715581 is a deficient number, since it is larger than the sum of its proper divisors (197119).

5715581 is a wasteful number, since it uses less digits than its factorization.

5715581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197118.

The product of its digits is 7000, while the sum is 32.

The square root of 5715581 is about 2390.7281317624. The cubic root of 5715581 is about 178.7942143710.

The spelling of 5715581 in words is "five million, seven hundred fifteen thousand, five hundred eighty-one".