3225809681 has 4 divisors (see below), whose sum is σ = 3228970164. Its totient is φ = 3222649200.

The previous prime is 3225809677. The next prime is 3225809689. The reversal of 3225809681 is 1869085223.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1869085223 = 6473 ⋅288751.

It can be written as a sum of positive squares in 2 ways, for example, as 2726510656 + 499299025 = 52216^2 + 22345^2 .

It is a cyclic number.

It is not a de Polignac number, because 3225809681 - 2² = 3225809677 is a prime.

It is a super-2 number, since 2×3225809681² = 20811696196066643522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3225809689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1578710 + ... + 1580751.

It is an arithmetic number, because the mean of its divisors is an integer number (807242541).

Almost surely, 2^3225809681 is an apocalyptic number.

It is an amenable number.

3225809681 is a deficient number, since it is larger than the sum of its proper divisors (3160483).

3225809681 is a wasteful number, since it uses less digits than its factorization.

3225809681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3160482.

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 3225809681 is about 56796.2118543130. The cubic root of 3225809681 is about 1477.5638154493.

The spelling of 3225809681 in words is "three billion, two hundred twenty-five million, eight hundred nine thousand, six hundred eighty-one".