3240221531 has 16 divisors (see below), whose sum is σ = 3453753600. Its totient is φ = 3033215328.

The previous prime is 3240221503. The next prime is 3240221557. The reversal of 3240221531 is 1351220423.

3240221531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3240221531 is a prime.

It is a super-2 number, since 2×3240221531² = 20998071139911967922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a junction number, because it is equal to n+sod(n) for n = 3240221497 and 3240221506.

It is not an unprimeable number, because it can be changed into a prime (3240223531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 305540 + ... + 315966.

It is an arithmetic number, because the mean of its divisors is an integer number (215859600).

Almost surely, 2^3240221531 is an apocalyptic number.

3240221531 is a deficient number, since it is larger than the sum of its proper divisors (213532069).

3240221531 is a wasteful number, since it uses less digits than its factorization.

3240221531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10738.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 3240221531 is about 56922.9438012477. The cubic root of 3240221531 is about 1479.7609686709.

Adding to 3240221531 its reverse (1351220423), we get a palindrome (4591441954).

The spelling of 3240221531 in words is "three billion, two hundred forty million, two hundred twenty-one thousand, five hundred thirty-one".