224221000520 has 48 divisors (see below), whose sum is σ = 554530048380. Its totient is φ = 81534907520.

The previous prime is 224221000513. The next prime is 224221000541. The reversal of 224221000520 is 25000122422.

It can be written as a sum of positive squares in 2 ways, for example, as 220804130404 + 3416870116 = 469898^2 + 58454^2 .

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 = 224221000492 and 224221000501.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23158487 + ... + 23168166.

Almost surely, 2^224221000520 is an apocalyptic number.

224221000520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

224221000520 is an abundant number, since it is smaller than the sum of its proper divisors (330309047860).

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

224221000520 is a wasteful number, since it uses less digits than its factorization.

224221000520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46326686 (or 46326671 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

Adding to 224221000520 its reverse (25000122422), we get a palindrome (249221122942).

The spelling of 224221000520 in words is "two hundred twenty-four billion, two hundred twenty-one million, five hundred twenty", and thus it is an aban number.