3231520131 has 8 divisors (see below), whose sum is σ = 4924221184. Its totient is φ = 1846582920.

The previous prime is 3231520031. The next prime is 3231520139. The reversal of 3231520131 is 1310251323.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3231520131 - 2⁷ = 3231520003 is a prime.

It is a super-2 number, since 2×3231520131² = 20885444714116514322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 153881911 = 3231520131 / (3 + 2 + 3 + 1 + 5 + 2 + 0 + 1 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3231520098 and 3231520107.

It is not an unprimeable number, because it can be changed into a prime (3231520139) 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 7 ways as a sum of consecutive naturals, for example, 76940935 + ... + 76940976.

It is an arithmetic number, because the mean of its divisors is an integer number (615527648).

Almost surely, 2^3231520131 is an apocalyptic number.

3231520131 is a deficient number, since it is larger than the sum of its proper divisors (1692701053).

3231520131 is a wasteful number, since it uses less digits than its factorization.

3231520131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153881921.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 3231520131 is about 56846.4610244121. The cubic root of 3231520131 is about 1478.4351812136.

Adding to 3231520131 its reverse (1310251323), we get a palindrome (4541771454).

The spelling of 3231520131 in words is "three billion, two hundred thirty-one million, five hundred twenty thousand, one hundred thirty-one".