5535581 has 4 divisors (see below), whose sum is σ = 5544000. Its totient is φ = 5527164.

The previous prime is 5535559. The next prime is 5535589. The reversal of 5535581 is 1855355.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1855355 = 5 ⋅371071.

It is a cyclic number.

It is not a de Polignac number, because 5535581 - 2¹⁴ = 5519197 is a prime.

It is a super-2 number, since 2×5535581² = 61285314015122, 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 (5535589) 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, 3131 + ... + 4568.

It is an arithmetic number, because the mean of its divisors is an integer number (1386000).

Almost surely, 2^5535581 is an apocalyptic number.

It is an amenable number.

5535581 is a deficient number, since it is larger than the sum of its proper divisors (8419).

5535581 is an equidigital number, since it uses as much as digits as its factorization.

5535581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8418.

The product of its digits is 15000, while the sum is 32.

The square root of 5535581 is about 2352.7815453203. The cubic root of 5535581 is about 176.8972453053.

It can be divided in two parts, 5535 and 581, that added together give a palindrome (6116).

The spelling of 5535581 in words is "five million, five hundred thirty-five thousand, five hundred eighty-one".