3231221240 has 256 divisors, whose sum is σ = 8579450880. Its totient is φ = 1085736960.

The previous prime is 3231221219. The next prime is 3231221243. The reversal of 3231221240 is 421221323.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3231221243) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 31371029 + ... + 31371131.

It is an arithmetic number, because the mean of its divisors is an integer number (33513480).

Almost surely, 2^3231221240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3231221240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4289725440).

3231221240 is an abundant number, since it is smaller than the sum of its proper divisors (5348229640).

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

3231221240 is a wasteful number, since it uses less digits than its factorization.

3231221240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254 (or 250 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 3231221240 is about 56843.8320312767. The cubic root of 3231221240 is about 1478.3895984769.

Adding to 3231221240 its reverse (421221323), we get a palindrome (3652442563).

The spelling of 3231221240 in words is "three billion, two hundred thirty-one million, two hundred twenty-one thousand, two hundred forty".