523412221 has 4 divisors (see below), whose sum is σ = 528304032. Its totient is φ = 518520412.

The previous prime is 523412207. The next prime is 523412233. The reversal of 523412221 is 122214325.

It is a happy number.

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 523412221 - 2⁷ = 523412093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 523412192 and 523412201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523412251) 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, 2445745 + ... + 2445958.

It is an arithmetic number, because the mean of its divisors is an integer number (132076008).

Almost surely, 2^523412221 is an apocalyptic number.

It is an amenable number.

523412221 is a deficient number, since it is larger than the sum of its proper divisors (4891811).

523412221 is a wasteful number, since it uses less digits than its factorization.

523412221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4891810.

The product of its digits is 960, while the sum is 22.

The square root of 523412221 is about 22878.2040597596. The cubic root of 523412221 is about 805.9002420524.

Adding to 523412221 its reverse (122214325), we get a palindrome (645626546).

The spelling of 523412221 in words is "five hundred twenty-three million, four hundred twelve thousand, two hundred twenty-one".