32000081 has 4 divisors (see below), whose sum is σ = 32012964. Its totient is φ = 31987200.

The previous prime is 32000057. The next prime is 32000083. The reversal of 32000081 is 18000023.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 18000023 = 257 ⋅70039.

It can be written as a sum of positive squares in 2 ways, for example, as 19219456 + 12780625 = 4384^2 + 3575^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-32000081 is a prime.

It is a super-2 number, since 2×32000081² = 2048010368013122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (32000083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1400 + ... + 8121.

It is an arithmetic number, because the mean of its divisors is an integer number (8003241).

Almost surely, 2^32000081 is an apocalyptic number.

It is an amenable number.

32000081 is a deficient number, since it is larger than the sum of its proper divisors (12883).

32000081 is an equidigital number, since it uses as much as digits as its factorization.

32000081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12882.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 32000081 is about 5656.8614089440. The cubic root of 32000081 is about 317.4804782673.

The spelling of 32000081 in words is "thirty-two million, eighty-one", and thus it is an aban number and an uban number.