325567681 has 4 divisors (see below), whose sum is σ = 326364100. Its totient is φ = 324771264.

The previous prime is 325567661. The next prime is 325567687. The reversal of 325567681 is 186765523.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 186765523 = 7 ⋅26680789.

It can be written as a sum of positive squares in 2 ways, for example, as 294431281 + 31136400 = 17159^2 + 5580^2 .

It is a cyclic number.

It is not a de Polignac number, because 325567681 - 2¹¹ = 325565633 is a prime.

It is a super-2 number, since 2×325567681² = 211988629823435522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (325567687) 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, 397596 + ... + 398413.

It is an arithmetic number, because the mean of its divisors is an integer number (81591025).

Almost surely, 2^325567681 is an apocalyptic number.

It is an amenable number.

325567681 is a deficient number, since it is larger than the sum of its proper divisors (796419).

325567681 is an equidigital number, since it uses as much as digits as its factorization.

325567681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796418.

The product of its digits is 302400, while the sum is 43.

The square root of 325567681 is about 18043.4941460904. The cubic root of 325567681 is about 687.9345086220.

The spelling of 325567681 in words is "three hundred twenty-five million, five hundred sixty-seven thousand, six hundred eighty-one".