3201000081 has 4 divisors (see below), whose sum is σ = 4268000112. Its totient is φ = 2134000052.

The previous prime is 3201000059. The next prime is 3201000083. The reversal of 3201000081 is 1800001023.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1800001023 = 3 ⋅600000341.

It is a cyclic number.

It is not a de Polignac number, because 3201000081 - 2⁹ = 3200999569 is a prime.

It is a super-2 number, since 2×3201000081² = 20492803037124013122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3201000081.

It is not an unprimeable number, because it can be changed into a prime (3201000083) 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, 533500011 + ... + 533500016.

It is an arithmetic number, because the mean of its divisors is an integer number (1067000028).

Almost surely, 2^3201000081 is an apocalyptic number.

It is an amenable number.

3201000081 is a deficient number, since it is larger than the sum of its proper divisors (1067000031).

3201000081 is a wasteful number, since it uses less digits than its factorization.

3201000081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1067000030.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 3201000081 is about 56577.3813550963. The cubic root of 3201000081 is about 1473.7660972127.

The spelling of 3201000081 in words is "three billion, two hundred one million, eighty-one", and thus it is an aban number.