523021231 has 2 divisors, whose sum is σ = 523021232. Its totient is φ = 523021230.

The previous prime is 523021193. The next prime is 523021237. The reversal of 523021231 is 132120325.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 523021231 - 2¹¹ = 523019183 is a prime.

It is a super-2 number, since 2×523021231² = 547102416153510722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 523021199 and 523021208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (523021237) 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 as a sum of consecutive naturals, namely, 261510615 + 261510616.

It is an arithmetic number, because the mean of its divisors is an integer number (261510616).

Almost surely, 2^523021231 is an apocalyptic number.

523021231 is a deficient number, since it is larger than the sum of its proper divisors (1).

523021231 is an equidigital number, since it uses as much as digits as its factorization.

523021231 is an odious number, because the sum of its binary digits is odd.

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

The square root of 523021231 is about 22869.6574307531. The cubic root of 523021231 is about 805.6995223549.

Adding to 523021231 its reverse (132120325), we get a palindrome (655141556).

The spelling of 523021231 in words is "five hundred twenty-three million, twenty-one thousand, two hundred thirty-one".