3220155072 has 168 divisors, whose sum is σ = 9439942512. Its totient is φ = 1049241600.

The previous prime is 3220155019. The next prime is 3220155077. The reversal of 3220155072 is 2705510223.

It is a super-3 number, since 3×3220155072³ (a number of 30 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (3220155077) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6984922 + ... + 6985382.

It is an arithmetic number, because the mean of its divisors is an integer number (56190134).

Almost surely, 2^3220155072 is an apocalyptic number.

3220155072 is a gapful number since it is divisible by the number (32) 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 3220155072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4719971256).

3220155072 is an abundant number, since it is smaller than the sum of its proper divisors (6219787440).

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

3220155072 is a wasteful number, since it uses less digits than its factorization.

3220155072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727 (or 714 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 3220155072 is about 56746.4102124531. The cubic root of 3220155072 is about 1476.6999566392.

Adding to 3220155072 its reverse (2705510223), we get a palindrome (5925665295).

The spelling of 3220155072 in words is "three billion, two hundred twenty million, one hundred fifty-five thousand, seventy-two".