32213231220 has 96 divisors (see below), whose sum is σ = 91555712640. Its totient is φ = 8461117440.

The previous prime is 32213231209. The next prime is 32213231231. The reversal of 32213231220 is 2213231223.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (32213231209) and next prime (32213231231).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3538875 + ... + 3547965.

It is an arithmetic number, because the mean of its divisors is an integer number (953705340).

Almost surely, 2^32213231220 is an apocalyptic number.

32213231220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 32213231220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45777856320).

32213231220 is an abundant number, since it is smaller than the sum of its proper divisors (59342481420).

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

32213231220 is a wasteful number, since it uses less digits than its factorization.

32213231220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9985 (or 9983 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 32213231220 its reverse (2213231223), we get a palindrome (34426462443).

The spelling of 32213231220 in words is "thirty-two billion, two hundred thirteen million, two hundred thirty-one thousand, two hundred twenty".