3231521145 has 24 divisors (see below), whose sum is σ = 5603949000. Its totient is φ = 1722663936.

The previous prime is 3231521123. The next prime is 3231521213. The reversal of 3231521145 is 5411251323.

It can be written as a sum of positive squares in 4 ways, for example, as 190108944 + 3041412201 = 13788^2 + 55149^2 .

It is not a de Polignac number, because 3231521145 - 2⁵ = 3231521113 is a prime.

It is a super-2 number, since 2×3231521145² = 20885457821164222050, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 86281 + ... + 117929.

It is an arithmetic number, because the mean of its divisors is an integer number (233497875).

Almost surely, 2^3231521145 is an apocalyptic number.

It is an amenable number.

3231521145 is a deficient number, since it is larger than the sum of its proper divisors (2372427855).

3231521145 is a wasteful number, since it uses less digits than its factorization.

3231521145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33929 (or 33926 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 3231521145 is about 56846.4699431724. The cubic root of 3231521145 is about 1478.4353358501.

Adding to 3231521145 its reverse (5411251323), we get a palindrome (8642772468).

The spelling of 3231521145 in words is "three billion, two hundred thirty-one million, five hundred twenty-one thousand, one hundred forty-five".