224005520 has 20 divisors (see below), whose sum is σ = 520813020. Its totient is φ = 89602176.

The previous prime is 224005519. The next prime is 224005531. The reversal of 224005520 is 25500422.

It can be written as a sum of positive squares in 2 ways, for example, as 124724224 + 99281296 = 11168^2 + 9964^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 224005492 and 224005501.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1399955 + ... + 1400114.

It is an arithmetic number, because the mean of its divisors is an integer number (26040651).

Almost surely, 2^224005520 is an apocalyptic number.

224005520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

224005520 is an abundant number, since it is smaller than the sum of its proper divisors (296807500).

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

224005520 is a wasteful number, since it uses less digits than its factorization.

224005520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2800082 (or 2800076 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 224005520 is about 14966.8139562166. The cubic root of 224005520 is about 607.3227830160.

Adding to 224005520 its reverse (25500422), we get a palindrome (249505942).

The spelling of 224005520 in words is "two hundred twenty-four million, five thousand, five hundred twenty".