32005381 has 4 divisors (see below), whose sum is σ = 32391072. Its totient is φ = 31619692.

The previous prime is 32005307. The next prime is 32005403. The reversal of 32005381 is 18350023.

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 a de Polignac number, because none of the positive numbers 2^k-32005381 is a prime.

It is a super-2 number, since 2×32005381² = 2048688825910322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32005301) 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, 192721 + ... + 192886.

It is an arithmetic number, because the mean of its divisors is an integer number (8097768).

Almost surely, 2^32005381 is an apocalyptic number.

It is an amenable number.

32005381 is a deficient number, since it is larger than the sum of its proper divisors (385691).

32005381 is an equidigital number, since it uses as much as digits as its factorization.

32005381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385690.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 32005381 is about 5657.3298471982. The cubic root of 32005381 is about 317.4980048235.

The spelling of 32005381 in words is "thirty-two million, five thousand, three hundred eighty-one".