5581081 has 4 divisors (see below), whose sum is σ = 6088464. Its totient is φ = 5073700.

The previous prime is 5581067. The next prime is 5581091. The reversal of 5581081 is 1801855.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5581081 - 2⁹ = 5580569 is a prime.

It is a super-2 number, since 2×5581081² = 62296930257122, which contains 22 as substring.

It is a Duffinian number.

5581081 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (5581001) 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, 253675 + ... + 253696.

It is an arithmetic number, because the mean of its divisors is an integer number (1522116).

Almost surely, 2^5581081 is an apocalyptic number.

It is an amenable number.

5581081 is a deficient number, since it is larger than the sum of its proper divisors (507383).

5581081 is a wasteful number, since it uses less digits than its factorization.

5581081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507382.

The product of its (nonzero) digits is 1600, while the sum is 28.

The square root of 5581081 is about 2362.4311630183. The cubic root of 5581081 is about 177.3805954863.

The spelling of 5581081 in words is "five million, five hundred eighty-one thousand, eighty-one".