3215994081 has 4 divisors (see below), whose sum is σ = 4287992112. Its totient is φ = 2143996052.

The previous prime is 3215994059. The next prime is 3215994233. The reversal of 3215994081 is 1804995123.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3215994081 - 2⁹ = 3215993569 is a prime.

It is a super-2 number, since 2×3215994081² = 20685235858054069122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3215994031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 535999011 + ... + 535999016.

It is an arithmetic number, because the mean of its divisors is an integer number (1071998028).

Almost surely, 2^3215994081 is an apocalyptic number.

It is an amenable number.

3215994081 is a deficient number, since it is larger than the sum of its proper divisors (1071998031).

3215994081 is a wasteful number, since it uses less digits than its factorization.

3215994081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1071998030.

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 3215994081 is about 56709.7353282485. The cubic root of 3215994081 is about 1476.0636328608.

The spelling of 3215994081 in words is "three billion, two hundred fifteen million, nine hundred ninety-four thousand, eighty-one".