4005002131 has 4 divisors (see below), whose sum is σ = 4313079232. Its totient is φ = 3696925032.

The previous prime is 4005002101. The next prime is 4005002179. The reversal of 4005002131 is 1312005004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4005002131 - 2²¹ = 4002904979 is a prime.

It is a super-2 number, since 2×4005002131² = 32080084138629082322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4005002101) 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, 154038531 + ... + 154038556.

It is an arithmetic number, because the mean of its divisors is an integer number (1078269808).

Almost surely, 2^4005002131 is an apocalyptic number.

4005002131 is a deficient number, since it is larger than the sum of its proper divisors (308077101).

4005002131 is a wasteful number, since it uses less digits than its factorization.

4005002131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308077100.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 4005002131 is about 63285.0861656994. The cubic root of 4005002131 is about 1588.0624753352.

Adding to 4005002131 its reverse (1312005004), we get a palindrome (5317007135).

The spelling of 4005002131 in words is "four billion, five million, two thousand, one hundred thirty-one".