3285161881 has 4 divisors (see below), whose sum is σ = 3285659700. Its totient is φ = 3284664064.

The previous prime is 3285161879. The next prime is 3285161903. The reversal of 3285161881 is 1881615823.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1881615823 = 5009 ⋅375647.

It can be written as a sum of positive squares in 2 ways, for example, as 2733616656 + 551545225 = 52284^2 + 23485^2 .

It is a cyclic number.

It is not a de Polignac number, because 3285161881 - 2¹ = 3285161879 is a prime.

It is a super-2 number, since 2×3285161881² = 21584577168750916322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3285161981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 238876 + ... + 252253.

It is an arithmetic number, because the mean of its divisors is an integer number (821414925).

Almost surely, 2^3285161881 is an apocalyptic number.

It is an amenable number.

3285161881 is a deficient number, since it is larger than the sum of its proper divisors (497819).

3285161881 is an equidigital number, since it uses as much as digits as its factorization.

3285161881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497818.

The product of its digits is 92160, while the sum is 43.

The square root of 3285161881 is about 57316.3317126977. The cubic root of 3285161881 is about 1486.5707785074.

The spelling of 3285161881 in words is "three billion, two hundred eighty-five million, one hundred sixty-one thousand, eight hundred eighty-one".