531320531 has 8 divisors (see below), whose sum is σ = 607656960. Its totient is φ = 455092488.

The previous prime is 531320521. The next prime is 531320549. The reversal of 531320531 is 135023135.

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 531320531 - 2¹⁸ = 531058387 is a prime.

It is a super-2 number, since 2×531320531² = 564603013324243922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 531320497 and 531320506.

It is not an unprimeable number, because it can be changed into a prime (531320521) 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 in 7 ways as a sum of consecutive naturals, for example, 16301 + ... + 36446.

It is an arithmetic number, because the mean of its divisors is an integer number (75957120).

Almost surely, 2^531320531 is an apocalyptic number.

531320531 is a deficient number, since it is larger than the sum of its proper divisors (76336429).

531320531 is a wasteful number, since it uses less digits than its factorization.

531320531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54193.

The product of its (nonzero) digits is 1350, while the sum is 23.

The square root of 531320531 is about 23050.3911246642. The cubic root of 531320531 is about 809.9387907819.

Adding to 531320531 its reverse (135023135), we get a palindrome (666343666).

The spelling of 531320531 in words is "five hundred thirty-one million, three hundred twenty thousand, five hundred thirty-one".