531155323 has 4 divisors (see below), whose sum is σ = 531227160. Its totient is φ = 531083488.

The previous prime is 531155309. The next prime is 531155341. The reversal of 531155323 is 323551135.

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

It is a cyclic number.

It is not a de Polignac number, because 531155323 - 2⁵ = 531155291 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 531155291 and 531155300.

It is not an unprimeable number, because it can be changed into a prime (531155363) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23365 + ... + 40102.

It is an arithmetic number, because the mean of its divisors is an integer number (132806790).

Almost surely, 2^531155323 is an apocalyptic number.

531155323 is a deficient number, since it is larger than the sum of its proper divisors (71837).

531155323 is an equidigital number, since it uses as much as digits as its factorization.

531155323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71836.

The product of its digits is 6750, while the sum is 28.

The square root of 531155323 is about 23046.8072192224. The cubic root of 531155323 is about 809.8548350333.

The spelling of 531155323 in words is "five hundred thirty-one million, one hundred fifty-five thousand, three hundred twenty-three".