223452242521 has 4 divisors (see below), whose sum is σ = 226280752000. Its totient is φ = 220623733044.

The previous prime is 223452242513. The next prime is 223452242561. The reversal of 223452242521 is 125242254322.

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 a cyclic number.

It is not a de Polignac number, because 223452242521 - 2³ = 223452242513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (223452242501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1414254621 + ... + 1414254778.

It is an arithmetic number, because the mean of its divisors is an integer number (56570188000).

Almost surely, 2^223452242521 is an apocalyptic number.

It is an amenable number.

223452242521 is a deficient number, since it is larger than the sum of its proper divisors (2828509479).

223452242521 is an equidigital number, since it uses as much as digits as its factorization.

223452242521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2828509478.

The product of its digits is 76800, while the sum is 34.

Adding to 223452242521 its reverse (125242254322), we get a palindrome (348694496843).

The spelling of 223452242521 in words is "two hundred twenty-three billion, four hundred fifty-two million, two hundred forty-two thousand, five hundred twenty-one".