2163887431 has 2 divisors, whose sum is σ = 2163887432. Its totient is φ = 2163887430.

The previous prime is 2163887329. The next prime is 2163887441. The reversal of 2163887431 is 1347883612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2163887431 - 2²⁹ = 1627016519 is a prime.

It is a super-2 number, since 2×2163887431² = 9364817628079559522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2163887441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1081943715 + 1081943716.

It is an arithmetic number, because the mean of its divisors is an integer number (1081943716).

Almost surely, 2^2163887431 is an apocalyptic number.

2163887431 is a deficient number, since it is larger than the sum of its proper divisors (1).

2163887431 is an equidigital number, since it uses as much as digits as its factorization.

2163887431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 193536, while the sum is 43.

The square root of 2163887431 is about 46517.6034528865. The cubic root of 2163887431 is about 1293.4358322437.

The spelling of 2163887431 in words is "two billion, one hundred sixty-three million, eight hundred eighty-seven thousand, four hundred thirty-one".