523115321 has 8 divisors (see below), whose sum is σ = 532166088. Its totient is φ = 514080000.

The previous prime is 523115317. The next prime is 523115363. The reversal of 523115321 is 123511325.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 490000 + 522625321 = 700^2 + 22861^2 .

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 523115321 - 2² = 523115317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (523111321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79871 + ... + 86171.

It is an arithmetic number, because the mean of its divisors is an integer number (66520761).

Almost surely, 2^523115321 is an apocalyptic number.

It is an amenable number.

523115321 is a deficient number, since it is larger than the sum of its proper divisors (9050767).

523115321 is a wasteful number, since it uses less digits than its factorization.

523115321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7723.

The product of its digits is 900, while the sum is 23.

The square root of 523115321 is about 22871.7144307111. The cubic root of 523115321 is about 805.7478337924.

Adding to 523115321 its reverse (123511325), we get a palindrome (646626646).

The spelling of 523115321 in words is "five hundred twenty-three million, one hundred fifteen thousand, three hundred twenty-one".