509243225 has 24 divisors (see below), whose sum is σ = 667978080. Its totient is φ = 384048000.

The previous prime is 509243197. The next prime is 509243237. The reversal of 509243225 is 522342905.

It is a de Polignac number, because none of the positive numbers 2^k-509243225 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 509243191 and 509243200.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 97685 + ... + 102765.

It is an arithmetic number, because the mean of its divisors is an integer number (27832420).

Almost surely, 2^509243225 is an apocalyptic number.

It is an amenable number.

509243225 is a deficient number, since it is larger than the sum of its proper divisors (158734855).

509243225 is a wasteful number, since it uses less digits than its factorization.

509243225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5321 (or 5316 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 509243225 is about 22566.4180808563. The cubic root of 509243225 is about 798.5615949763.

The spelling of 509243225 in words is "five hundred nine million, two hundred forty-three thousand, two hundred twenty-five".