4005162281 has 4 divisors (see below), whose sum is σ = 4025493252. Its totient is φ = 3984831312.

The previous prime is 4005162269. The next prime is 4005162289. The reversal of 4005162281 is 1822615004.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2526067600 + 1479094681 = 50260^2 + 38459^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4005162281 is a prime.

It is a super-2 number, since 2×4005162281² = 32082649794290245922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4005162289) 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, 10165190 + ... + 10165583.

It is an arithmetic number, because the mean of its divisors is an integer number (1006373313).

Almost surely, 2^4005162281 is an apocalyptic number.

It is an amenable number.

4005162281 is a deficient number, since it is larger than the sum of its proper divisors (20330971).

4005162281 is a wasteful number, since it uses less digits than its factorization.

4005162281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20330970.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 4005162281 is about 63286.3514590626. The cubic root of 4005162281 is about 1588.0836425995.

Adding to 4005162281 its reverse (1822615004), we get a palindrome (5827777285).

The spelling of 4005162281 in words is "four billion, five million, one hundred sixty-two thousand, two hundred eighty-one".