5581020 has 48 divisors (see below), whose sum is σ = 15740928. Its totient is φ = 1477440.

The previous prime is 5581001. The next prime is 5581027. The reversal of 5581020 is 201855.

It is a super-2 number, since 2×5581020² = 62295568480800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5581027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11217 + ... + 11703.

It is an arithmetic number, because the mean of its divisors is an integer number (327936).

Almost surely, 2^5581020 is an apocalyptic number.

It is an amenable number.

5581020 is an abundant number, since it is smaller than the sum of its proper divisors (10159908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5581020 is a wasteful number, since it uses less digits than its factorization.

5581020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690 (or 688 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 5581020 is about 2362.4182525539. The cubic root of 5581020 is about 177.3799492401.

Adding to 5581020 its reverse (201855), we get a palindrome (5782875).

The spelling of 5581020 in words is "five million, five hundred eighty-one thousand, twenty".