3212231220 has 288 divisors, whose sum is σ = 11024657280. Its totient is φ = 750228480.

The previous prime is 3212231213. The next prime is 3212231227. The reversal of 3212231220 is 221322123.

3212231220 is a `hidden beast` number, since 3 + 212 + 231 + 220 = 666.

It is an interprime number because it is at equal distance from previous prime (3212231213) and next prime (3212231227).

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

It is a junction number, because it is equal to n+sod(n) for n = 3212231193 and 3212231202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3212231227) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 11941246 + ... + 11941514.

It is an arithmetic number, because the mean of its divisors is an integer number (38280060).

Almost surely, 2^3212231220 is an apocalyptic number.

3212231220 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 3212231220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5512328640).

3212231220 is an abundant number, since it is smaller than the sum of its proper divisors (7812426060).

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

3212231220 is a wasteful number, since it uses less digits than its factorization.

3212231220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495 (or 490 counting only the distinct ones).

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

The square root of 3212231220 is about 56676.5491186611. The cubic root of 3212231220 is about 1475.4877207396.

Adding to 3212231220 its reverse (221322123), we get a palindrome (3433553343).

It can be divided in two parts, 3212 and 231220, that added together give a palindrome (234432).

The spelling of 3212231220 in words is "three billion, two hundred twelve million, two hundred thirty-one thousand, two hundred twenty".