32220216 has 48 divisors (see below), whose sum is σ = 99730800. Its totient is φ = 9205632.

The previous prime is 32220187. The next prime is 32220241. The reversal of 32220216 is 61202223.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 31461 + ... + 32468.

It is an arithmetic number, because the mean of its divisors is an integer number (2077725).

Almost surely, 2^32220216 is an apocalyptic number.

32220216 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

32220216 is an abundant number, since it is smaller than the sum of its proper divisors (67510584).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

32220216 is a wasteful number, since it uses less digits than its factorization.

32220216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63948 (or 63941 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 32220216 is about 5676.2854050867. The cubic root of 32220216 is about 318.2068192996.

Adding to 32220216 its reverse (61202223), we get a palindrome (93422439).

The spelling of 32220216 in words is "thirty-two million, two hundred twenty thousand, two hundred sixteen".