3231581409 has 27 divisors (see below), whose sum is σ = 5431942737. Its totient is φ = 1845935784.

The previous prime is 3231581387. The next prime is 3231581449. The reversal of 3231581409 is 9041851323.

The square root of 3231581409 is 56847.

It is a perfect power (a square), and thus also a powerful number.

3231581409 is a `hidden beast` number, since 3 + 2 + 31 + 581 + 40 + 9 = 666.

It is not a de Polignac number, because 3231581409 - 2⁷ = 3231581281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3231581449) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1192434 + ... + 1195140.

Almost surely, 2^3231581409 is an apocalyptic number.

3231581409 is the 56847-th square number.

3231581409 is the 28424-th centered octagonal number.

It is an amenable number.

3231581409 is a deficient number, since it is larger than the sum of its proper divisors (2200361328).

3231581409 is an frugal number, since it uses more digits than its factorization.

3231581409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5434 (or 2717 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The cubic root of 3231581409 is about 1478.4445261426. Note that the first 3 decimals are identical.

Multiplying 3231581409 by its sum of digits (36), we get a square (116336930724 = 341082²).

The spelling of 3231581409 in words is "three billion, two hundred thirty-one million, five hundred eighty-one thousand, four hundred nine".