5205581 has 4 divisors (see below), whose sum is σ = 5230464. Its totient is φ = 5180700.

The previous prime is 5205539. The next prime is 5205583. The reversal of 5205581 is 1855025.

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 5205581 - 2¹⁰ = 5204557 is a prime.

It is a super-2 number, since 2×5205581² = 54196147095122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5205581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5205583) 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, 12125 + ... + 12546.

It is an arithmetic number, because the mean of its divisors is an integer number (1307616).

Almost surely, 2^5205581 is an apocalyptic number.

It is an amenable number.

5205581 is a deficient number, since it is larger than the sum of its proper divisors (24883).

5205581 is a wasteful number, since it uses less digits than its factorization.

5205581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24882.

The product of its (nonzero) digits is 2000, while the sum is 26.

The square root of 5205581 is about 2281.5742372318. The cubic root of 5205581 is about 173.3097794260.

The spelling of 5205581 in words is "five million, two hundred five thousand, five hundred eighty-one".