223521252 has 12 divisors (see below), whose sum is σ = 521549616. Its totient is φ = 74507080.

The previous prime is 223521211. The next prime is 223521281. The reversal of 223521252 is 252125322.

223521252 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

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, 9313374 + ... + 9313397.

It is an arithmetic number, because the mean of its divisors is an integer number (43462468).

Almost surely, 2^223521252 is an apocalyptic number.

It is an amenable number.

223521252 is an abundant number, since it is smaller than the sum of its proper divisors (298028364).

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

223521252 is a wasteful number, since it uses less digits than its factorization.

223521252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18626778 (or 18626776 counting only the distinct ones).

The product of its digits is 2400, while the sum is 24.

The square root of 223521252 is about 14950.6271440365. The cubic root of 223521252 is about 606.8848188332.

Adding to 223521252 its reverse (252125322), we get a palindrome (475646574).

The spelling of 223521252 in words is "two hundred twenty-three million, five hundred twenty-one thousand, two hundred fifty-two".