3911985231 has 16 divisors (see below), whose sum is σ = 6503040768. Its totient is φ = 2032200000.

The previous prime is 3911985229. The next prime is 3911985271. The reversal of 3911985231 is 1325891193.

It is not a de Polignac number, because 3911985231 - 2¹ = 3911985229 is a prime.

It is a super-2 number, since 2×3911985231² = 30607256895124246722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3911985211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8467270 + ... + 8467731.

It is an arithmetic number, because the mean of its divisors is an integer number (406440048).

Almost surely, 2^3911985231 is an apocalyptic number.

3911985231 is a deficient number, since it is larger than the sum of its proper divisors (2591055537).

3911985231 is a wasteful number, since it uses less digits than its factorization.

3911985231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16935022.

The product of its digits is 58320, while the sum is 42.

The square root of 3911985231 is about 62545.8650192001. The cubic root of 3911985231 is about 1575.6717022059.

The spelling of 3911985231 in words is "three billion, nine hundred eleven million, nine hundred eighty-five thousand, two hundred thirty-one".