531331329 has 8 divisors (see below), whose sum is σ = 708577792. Its totient is φ = 354152880.

The previous prime is 531331279. The next prime is 531331337. The reversal of 531331329 is 923133135.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 531331329 - 2¹³ = 531323137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 531331296 and 531331305.

It is not an unprimeable number, because it can be changed into a prime (531331369) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5472 + ... + 33054.

It is an arithmetic number, because the mean of its divisors is an integer number (88572224).

Almost surely, 2^531331329 is an apocalyptic number.

It is an amenable number.

531331329 is a deficient number, since it is larger than the sum of its proper divisors (177246463).

531331329 is a wasteful number, since it uses less digits than its factorization.

531331329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34007.

The product of its digits is 7290, while the sum is 30.

The square root of 531331329 is about 23050.6253494347. The cubic root of 531331329 is about 809.9442775263.

The spelling of 531331329 in words is "five hundred thirty-one million, three hundred thirty-one thousand, three hundred twenty-nine".