523023021 has 8 divisors (see below), whose sum is σ = 774848960. Its totient is φ = 348681996.

The previous prime is 523023001. The next prime is 523023047. The reversal of 523023021 is 120320325.

It is not a de Polignac number, because 523023021 - 2⁷ = 523022893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 523022985 and 523023003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523023001) 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, 9685585 + ... + 9685638.

It is an arithmetic number, because the mean of its divisors is an integer number (96856120).

Almost surely, 2^523023021 is an apocalyptic number.

It is an amenable number.

523023021 is a deficient number, since it is larger than the sum of its proper divisors (251825939).

523023021 is a wasteful number, since it uses less digits than its factorization.

523023021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19371232 (or 19371226 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 523023021 is about 22869.6965655428. The cubic root of 523023021 is about 805.7004415021.

Adding to 523023021 its reverse (120320325), we get a palindrome (643343346).

The spelling of 523023021 in words is "five hundred twenty-three million, twenty-three thousand, twenty-one".