3813645231 has 12 divisors (see below), whose sum is σ = 6009380520. Its totient is φ = 2311300080.

The previous prime is 3813645221. The next prime is 3813645247. The reversal of 3813645231 is 1325463183.

3813645231 is a `hidden beast` number, since 3 + 8 + 1 + 3 + 645 + 2 + 3 + 1 = 666.

It is not a de Polignac number, because 3813645231 - 2¹⁰ = 3813644207 is a prime.

It is a super-2 number, since 2×3813645231² = 29087779895858086722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3813645221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19260736 + ... + 19260933.

It is an arithmetic number, because the mean of its divisors is an integer number (500781710).

Almost surely, 2^3813645231 is an apocalyptic number.

3813645231 is a deficient number, since it is larger than the sum of its proper divisors (2195735289).

3813645231 is a wasteful number, since it uses less digits than its factorization.

3813645231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38521686 (or 38521683 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 3813645231 is about 61754.7182893745. The cubic root of 3813645231 is about 1562.3563489995.

The spelling of 3813645231 in words is "three billion, eight hundred thirteen million, six hundred forty-five thousand, two hundred thirty-one".