531043221 has 8 divisors (see below), whose sum is σ = 711765504. Its totient is φ = 352174880.

The previous prime is 531043207. The next prime is 531043267. The reversal of 531043221 is 122340135.

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 531043221 - 2²¹ = 528946069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531043291) 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, 462816 + ... + 463961.

It is an arithmetic number, because the mean of its divisors is an integer number (88970688).

Almost surely, 2^531043221 is an apocalyptic number.

It is an amenable number.

531043221 is a deficient number, since it is larger than the sum of its proper divisors (180722283).

531043221 is a wasteful number, since it uses less digits than its factorization.

531043221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 926971.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 531043221 is about 23044.3750403434. The cubic root of 531043221 is about 809.7978568887.

Adding to 531043221 its reverse (122340135), we get a palindrome (653383356).

The spelling of 531043221 in words is "five hundred thirty-one million, forty-three thousand, two hundred twenty-one".