3213881 has 6 divisors (see below), whose sum is σ = 3532746. Its totient is φ = 2921600.

The previous prime is 3213877. The next prime is 3213887. The reversal of 3213881 is 1883123.

It can be written as a sum of positive squares in only one way, i.e., 3097600 + 116281 = 1760^2 + 341^2 .

It is not a de Polignac number, because 3213881 - 2² = 3213877 is a prime.

It is a super-2 number, since 2×3213881² = 20658062164322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3213881.

It is not an unprimeable number, because it can be changed into a prime (3213887) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13160 + ... + 13401.

It is an arithmetic number, because the mean of its divisors is an integer number (588791).

Almost surely, 2^3213881 is an apocalyptic number.

It is an amenable number.

3213881 is a deficient number, since it is larger than the sum of its proper divisors (318865).

3213881 is a wasteful number, since it uses less digits than its factorization.

3213881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26583 (or 26572 counting only the distinct ones).

The product of its digits is 1152, while the sum is 26.

The square root of 3213881 is about 1792.7300410268. The cubic root of 3213881 is about 147.5740277644.

The spelling of 3213881 in words is "three million, two hundred thirteen thousand, eight hundred eighty-one".