325731009 has 16 divisors (see below), whose sum is σ = 446515200. Its totient is φ = 211112400.

The previous prime is 325730989. The next prime is 325731013. The reversal of 325731009 is 900137523.

It is not a de Polignac number, because 325731009 - 2²⁰ = 324682433 is a prime.

It is a super-2 number, since 2×325731009² = 212201380448316162, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (325731059) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13642 + ... + 28940.

It is an arithmetic number, because the mean of its divisors is an integer number (27907200).

Almost surely, 2^325731009 is an apocalyptic number.

It is an amenable number.

325731009 is a deficient number, since it is larger than the sum of its proper divisors (120784191).

325731009 is a wasteful number, since it uses less digits than its factorization.

325731009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15500.

The product of its (nonzero) digits is 5670, while the sum is 30.

The square root of 325731009 is about 18048.0195312394. The cubic root of 325731009 is about 688.0495284168.

The spelling of 325731009 in words is "three hundred twenty-five million, seven hundred thirty-one thousand, nine".