523532321 has 12 divisors (see below), whose sum is σ = 577914876. Its totient is φ = 471454080.

The previous prime is 523532299. The next prime is 523532363. The reversal of 523532321 is 123235325.

It can be written as a sum of positive squares in 6 ways, for example, as 161163025 + 362369296 = 12695^2 + 19036^2 .

It is not a de Polignac number, because 523532321 - 2⁶ = 523532257 is a prime.

It is a super-2 number, since 2×523532321² = 548172182263294082, which contains 22 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 (523582321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9875 + ... + 33831.

It is an arithmetic number, because the mean of its divisors is an integer number (48159573).

Almost surely, 2^523532321 is an apocalyptic number.

It is an amenable number.

523532321 is a deficient number, since it is larger than the sum of its proper divisors (54382555).

523532321 is a wasteful number, since it uses less digits than its factorization.

523532321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24052 (or 24011 counting only the distinct ones).

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

The square root of 523532321 is about 22880.8286781751. The cubic root of 523532321 is about 805.9618768489.

Adding to 523532321 its reverse (123235325), we get a palindrome (646767646).

The spelling of 523532321 in words is "five hundred twenty-three million, five hundred thirty-two thousand, three hundred twenty-one".