325809731 has 12 divisors (see below), whose sum is σ = 355819968. Its totient is φ = 296564544.

The previous prime is 325809713. The next prime is 325809733. The reversal of 325809731 is 137908523.

It is not a de Polignac number, because 325809731 - 2¹⁸ = 325547587 is a prime.

It is a super-2 number, since 2×325809731² = 212303961628584722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (325809733) 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, 66926 + ... + 71628.

It is an arithmetic number, because the mean of its divisors is an integer number (29651664).

Almost surely, 2^325809731 is an apocalyptic number.

325809731 is a deficient number, since it is larger than the sum of its proper divisors (30010237).

325809731 is an equidigital number, since it uses as much as digits as its factorization.

325809731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4862 (or 4789 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 325809731 is about 18050.2003035977. The cubic root of 325809731 is about 688.1049527502.

The spelling of 325809731 in words is "three hundred twenty-five million, eight hundred nine thousand, seven hundred thirty-one".