4002161731 has 2 divisors, whose sum is σ = 4002161732. Its totient is φ = 4002161730.

The previous prime is 4002161693. The next prime is 4002161803. The reversal of 4002161731 is 1371612004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4002161731 - 2¹³ = 4002153539 is a prime.

It is a super-2 number, since 2×4002161731² = 32034597042161832722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4002161696 and 4002161705.

It is not a weakly prime, because it can be changed into another prime (4002165731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2001080865 + 2001080866.

It is an arithmetic number, because the mean of its divisors is an integer number (2001080866).

Almost surely, 2^4002161731 is an apocalyptic number.

4002161731 is a deficient number, since it is larger than the sum of its proper divisors (1).

4002161731 is an equidigital number, since it uses as much as digits as its factorization.

4002161731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 4002161731 is about 63262.6408791160. The cubic root of 4002161731 is about 1587.6869616414.

Adding to 4002161731 its reverse (1371612004), we get a palindrome (5373773735).

The spelling of 4002161731 in words is "four billion, two million, one hundred sixty-one thousand, seven hundred thirty-one".