224052013521 has 24 divisors (see below), whose sum is σ = 383562297664. Its totient is φ = 128029721040.

The previous prime is 224052013511. The next prime is 224052013543. The reversal of 224052013521 is 125310250422.

224052013521 is a `hidden beast` number, since 2 + 2 + 4 + 0 + 520 + 135 + 2 + 1 = 666.

It is not a de Polignac number, because 224052013521 - 2¹⁵ = 224051980753 is a prime.

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 (224052013511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 65857210 + ... + 65860611.

Almost surely, 2^224052013521 is an apocalyptic number.

224052013521 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

224052013521 is a deficient number, since it is larger than the sum of its proper divisors (159510284143).

224052013521 is an equidigital number, since it uses as much as digits as its factorization.

224052013521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131717843 (or 131717831 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 224052013521 its reverse (125310250422), we get a palindrome (349362263943).

The spelling of 224052013521 in words is "two hundred twenty-four billion, fifty-two million, thirteen thousand, five hundred twenty-one".