523221533 has 4 divisors (see below), whose sum is σ = 523359360. Its totient is φ = 523083708.

The previous prime is 523221469. The next prime is 523221539. The reversal of 523221533 is 335122325.

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 523221533 - 2⁶ = 523221469 is a prime.

It is a super-3 number, since 3×523221533³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523221539) 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 3 ways as a sum of consecutive naturals, for example, 63053 + ... + 70866.

It is an arithmetic number, because the mean of its divisors is an integer number (130839840).

Almost surely, 2^523221533 is an apocalyptic number.

It is an amenable number.

523221533 is a deficient number, since it is larger than the sum of its proper divisors (137827).

523221533 is a wasteful number, since it uses less digits than its factorization.

523221533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137826.

The product of its digits is 5400, while the sum is 26.

The square root of 523221533 is about 22874.0362201340. The cubic root of 523221533 is about 805.8023624302.

Adding to 523221533 its reverse (335122325), we get a palindrome (858343858).

The spelling of 523221533 in words is "five hundred twenty-three million, two hundred twenty-one thousand, five hundred thirty-three".