523226221 has 16 divisors (see below), whose sum is σ = 633989376.
Its totient is φ = 421537536.
The previous prime is 523226201. The next prime is 523226227. The reversal of 523226221 is 122622325.
It is a happy number.
It is not a de Polignac number, because 523226221 - 25 = 523226189 is a prime.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (523226227) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (19) of ones.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103075 + ... + 108031.
It is an arithmetic number, because the mean of its divisors is an integer number (39624336).
Almost surely, 2523226221 is an apocalyptic number.
It is an amenable number.
523226221 is a deficient number, since it is larger than the sum of its proper divisors (110763155).
523226221 is a wasteful number, since it uses less digits than its factorization.
523226221 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 5868.
The product of its digits is 2880, while the sum is 25.
The square root of 523226221 is about 22874.1386941673.
The cubic root of 523226221 is about 805.8047690528.
Adding to 523226221 its reverse (122622325), we get a palindrome (645848546).
The spelling of 523226221 in words is "five hundred twenty-three million, two hundred twenty-six thousand, two hundred twenty-one".