3865038131 has 4 divisors (see below), whose sum is σ = 3865180152. Its totient is φ = 3864896112.

The previous prime is 3865038049. The next prime is 3865038137. The reversal of 3865038131 is 1318305683.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1318305683 = 83 ⋅15883201.

It is a cyclic number.

It is not a de Polignac number, because 3865038131 - 2¹⁴ = 3865021747 is a prime.

It is a super-2 number, since 2×3865038131² = 29877039508167946322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3865038137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15965 + ... + 89358.

It is an arithmetic number, because the mean of its divisors is an integer number (966295038).

Almost surely, 2^3865038131 is an apocalyptic number.

3865038131 is a deficient number, since it is larger than the sum of its proper divisors (142021).

3865038131 is a wasteful number, since it uses less digits than its factorization.

3865038131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142020.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 3865038131 is about 62169.4308402450. The cubic root of 3865038131 is about 1569.3431916646.

The spelling of 3865038131 in words is "three billion, eight hundred sixty-five million, thirty-eight thousand, one hundred thirty-one".