32213220 has 48 divisors (see below), whose sum is σ = 97137600. Its totient is φ = 7929216.

The previous prime is 32213219. The next prime is 32213257. The reversal of 32213220 is 2231223.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 32213220.

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 15 ways as a sum of consecutive naturals, for example, 19870 + ... + 21429.

It is an arithmetic number, because the mean of its divisors is an integer number (2023700).

Almost surely, 2^32213220 is an apocalyptic number.

32213220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

32213220 is an abundant number, since it is smaller than the sum of its proper divisors (64924380).

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

32213220 is a wasteful number, since it uses less digits than its factorization.

32213220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41324 (or 41322 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 32213220 is about 5675.6691235483. The cubic root of 32213220 is about 318.1837868029.

Adding to 32213220 its reverse (2231223), we get a palindrome (34444443).

It can be divided in two parts, 3221 and 3220, that added together give a triangular number (6441 = T₁₁₃).

The spelling of 32213220 in words is "thirty-two million, two hundred thirteen thousand, two hundred twenty".