509243231 has 12 divisors (see below), whose sum is σ = 611496000. Its totient is φ = 422412480.

The previous prime is 509243197. The next prime is 509243237. The reversal of 509243231 is 132342905.

It is not a de Polignac number, because 509243231 - 2²⁶ = 442134367 is a prime.

It is a super-2 number, since 2×509243231² = 518657336638638722, 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 = 509243194 and 509243203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (509243237) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 166106 + ... + 169143.

It is an arithmetic number, because the mean of its divisors is an integer number (50958000).

Almost surely, 2^509243231 is an apocalyptic number.

509243231 is a deficient number, since it is larger than the sum of its proper divisors (102252769).

509243231 is a wasteful number, since it uses less digits than its factorization.

509243231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335294 (or 335287 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 509243231 is about 22566.4182137972. The cubic root of 509243231 is about 798.5615981125.

The spelling of 509243231 in words is "five hundred nine million, two hundred forty-three thousand, two hundred thirty-one".