3230731865781 has 24 divisors (see below), whose sum is σ = 5335653872640. Its totient is φ = 1845307879776.

The previous prime is 3230731865723. The next prime is 3230731865789. The reversal of 3230731865781 is 1875681370323.

It is a happy number.

3230731865781 is a `hidden beast` number, since 3 + 2 + 30 + 7 + 31 + 8 + 6 + 578 + 1 = 666.

It is not a de Polignac number, because 3230731865781 - 2⁶ = 3230731865717 is a prime.

It is a super-2 number, since 2×3230731865781² (a number of 26 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3230731865789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11310810 + ... + 11592923.

It is an arithmetic number, because the mean of its divisors is an integer number (222318911360).

Almost surely, 2^{3230731865781} is an apocalyptic number.

It is an amenable number.

3230731865781 is a deficient number, since it is larger than the sum of its proper divisors (2104922006859).

3230731865781 is a wasteful number, since it uses less digits than its factorization.

3230731865781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22905985 (or 22905982 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 54.

The spelling of 3230731865781 in words is "three trillion, two hundred thirty billion, seven hundred thirty-one million, eight hundred sixty-five thousand, seven hundred eighty-one".