5581224 has 128 divisors (see below), whose sum is σ = 17712000. Its totient is φ = 1632960.

The previous prime is 5581217. The next prime is 5581229. The reversal of 5581224 is 4221855.

It is a happy number.

It is a super-2 number, since 2×5581224² = 62300122676352, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (5581229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 192442 + ... + 192470.

It is an arithmetic number, because the mean of its divisors is an integer number (138375).

Almost surely, 2^5581224 is an apocalyptic number.

5581224 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5581224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8856000).

5581224 is an abundant number, since it is smaller than the sum of its proper divisors (12130776).

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

5581224 is a wasteful number, since it uses less digits than its factorization.

5581224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67 (or 45 counting only the distinct ones).

The product of its digits is 3200, while the sum is 27.

The square root of 5581224 is about 2362.4614282566. The cubic root of 5581224 is about 177.3821104382.

The spelling of 5581224 in words is "five million, five hundred eighty-one thousand, two hundred twenty-four".