52223521 has 4 divisors (see below), whose sum is σ = 59684032. Its totient is φ = 44763012.

The previous prime is 52223513. The next prime is 52223527. The reversal of 52223521 is 12532225.

52223521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 52223521 - 2³ = 52223513 is a prime.

It is a super-2 number, since 2×52223521² = 5454592291274882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 52223492 and 52223501.

It is not an unprimeable number, because it can be changed into a prime (52223527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3730245 + ... + 3730258.

It is an arithmetic number, because the mean of its divisors is an integer number (14921008).

Almost surely, 2^52223521 is an apocalyptic number.

It is an amenable number.

52223521 is a deficient number, since it is larger than the sum of its proper divisors (7460511).

52223521 is an equidigital number, since it uses as much as digits as its factorization.

52223521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7460510.

The product of its digits is 1200, while the sum is 22.

The square root of 52223521 is about 7226.5843245616. The cubic root of 52223521 is about 373.7851554721.

Adding to 52223521 its reverse (12532225), we get a palindrome (64755746).

The spelling of 52223521 in words is "fifty-two million, two hundred twenty-three thousand, five hundred twenty-one".