2163940531 has 4 divisors (see below), whose sum is σ = 2238559200. Its totient is φ = 2089321864.

The previous prime is 2163940529. The next prime is 2163940543. The reversal of 2163940531 is 1350493612.

2163940531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2163940531 - 2¹ = 2163940529 is a prime.

It is a super-2 number, since 2×2163940531² = 9365277243409123922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2163940631) 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, 37309291 + ... + 37309348.

It is an arithmetic number, because the mean of its divisors is an integer number (559639800).

Almost surely, 2^2163940531 is an apocalyptic number.

2163940531 is a deficient number, since it is larger than the sum of its proper divisors (74618669).

2163940531 is an equidigital number, since it uses as much as digits as its factorization.

2163940531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74618668.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 2163940531 is about 46518.1742010582. The cubic root of 2163940531 is about 1293.4464121041.

The spelling of 2163940531 in words is "two billion, one hundred sixty-three million, nine hundred forty thousand, five hundred thirty-one".