32916021 has 16 divisors (see below), whose sum is σ = 44953920. Its totient is φ = 21415680.

The previous prime is 32916011. The next prime is 32916043. The reversal of 32916021 is 12061923.

It is not a de Polignac number, because 32916021 - 2¹⁰ = 32914997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 32915982 and 32916000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32916011) 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 15 ways as a sum of consecutive naturals, for example, 37890 + ... + 38748.

It is an arithmetic number, because the mean of its divisors is an integer number (2809620).

Almost surely, 2^32916021 is an apocalyptic number.

It is an amenable number.

32916021 is a deficient number, since it is larger than the sum of its proper divisors (12037899).

32916021 is a wasteful number, since it uses less digits than its factorization.

32916021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1156.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 32916021 is about 5737.2485565818. The cubic root of 32916021 is about 320.4811154799.

Adding to 32916021 its reverse (12061923), we get a palindrome (44977944).

The spelling of 32916021 in words is "thirty-two million, nine hundred sixteen thousand, twenty-one".