32166981 has 72 divisors (see below), whose sum is σ = 62244000. Its totient is φ = 15785280.

The previous prime is 32166971. The next prime is 32166989. The reversal of 32166981 is 18966123.

It is not a de Polignac number, because 32166981 - 2⁶ = 32166917 is a prime.

It is a super-2 number, since 2×32166981² = 2069429333308722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32166989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 91995 + ... + 92343.

It is an arithmetic number, because the mean of its divisors is an integer number (864500).

Almost surely, 2^32166981 is an apocalyptic number.

It is an amenable number.

32166981 is a deficient number, since it is larger than the sum of its proper divisors (30077019).

32166981 is a wasteful number, since it uses less digits than its factorization.

32166981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399 (or 389 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 32166981 is about 5671.5942203229. The cubic root of 32166981 is about 318.0314730924.

The spelling of 32166981 in words is "thirty-two million, one hundred sixty-six thousand, nine hundred eighty-one".