523231021 has 8 divisors (see below), whose sum is σ = 548899200. Its totient is φ = 498071280.

The previous prime is 523231013. The next prime is 523231043. The reversal of 523231021 is 120132325.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 523231021 - 2³ = 523231013 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 523231021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523231001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125001 + ... + 129118.

It is an arithmetic number, because the mean of its divisors is an integer number (68612400).

Almost surely, 2^523231021 is an apocalyptic number.

It is an amenable number.

523231021 is a deficient number, since it is larger than the sum of its proper divisors (25668179).

523231021 is a wasteful number, since it uses less digits than its factorization.

523231021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254219.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 523231021 is about 22874.2436159100. The cubic root of 523231021 is about 805.8072331565.

Adding to 523231021 its reverse (120132325), we get a palindrome (643363346).

The spelling of 523231021 in words is "five hundred twenty-three million, two hundred thirty-one thousand, twenty-one".