3231906981 has 8 divisors (see below), whose sum is σ = 4390515360. Its totient is φ = 2113951632.

The previous prime is 3231906947. The next prime is 3231907033. The reversal of 3231906981 is 1896091323.

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

It is not a de Polignac number, because 3231906981 - 2⁶ = 3231906917 is a prime.

It is a super-2 number, since 2×3231906981² = 20890445467673068722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3231906481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10163071 + ... + 10163388.

It is an arithmetic number, because the mean of its divisors is an integer number (548814420).

Almost surely, 2^3231906981 is an apocalyptic number.

It is an amenable number.

3231906981 is a deficient number, since it is larger than the sum of its proper divisors (1158608379).

3231906981 is a wasteful number, since it uses less digits than its factorization.

3231906981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20326515.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 3231906981 is about 56849.8635090710. The cubic root of 3231906981 is about 1478.4941740721.

The spelling of 3231906981 in words is "three billion, two hundred thirty-one million, nine hundred six thousand, nine hundred eighty-one".