524332021 has 4 divisors (see below), whose sum is σ = 534225132. Its totient is φ = 514438912.

The previous prime is 524332013. The next prime is 524332051. The reversal of 524332021 is 120233425.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 329422500 + 194909521 = 18150^2 + 13961^2 .

It is a cyclic number.

It is not a de Polignac number, because 524332021 - 2³ = 524332013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 524331983 and 524332001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (524332001) 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 3 ways as a sum of consecutive naturals, for example, 4946476 + ... + 4946581.

It is an arithmetic number, because the mean of its divisors is an integer number (133556283).

Almost surely, 2^524332021 is an apocalyptic number.

It is an amenable number.

524332021 is a deficient number, since it is larger than the sum of its proper divisors (9893111).

524332021 is an equidigital number, since it uses as much as digits as its factorization.

524332021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9893110.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 524332021 is about 22898.2973384486. The cubic root of 524332021 is about 806.3720392473.

Adding to 524332021 its reverse (120233425), we get a palindrome (644565446).

The spelling of 524332021 in words is "five hundred twenty-four million, three hundred thirty-two thousand, twenty-one".