2168869731 has 32 divisors (see below), whose sum is σ = 3369305088. Its totient is φ = 1215406080.

The previous prime is 2168869723. The next prime is 2168869793. The reversal of 2168869731 is 1379688612.

It is not a de Polignac number, because 2168869731 - 2³ = 2168869723 is a prime.

It is a super-2 number, since 2×2168869731² = 9407991820096024722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2168869531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 283995 + ... + 291531.

It is an arithmetic number, because the mean of its divisors is an integer number (105290784).

Almost surely, 2^2168869731 is an apocalyptic number.

2168869731 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2168869731 is a deficient number, since it is larger than the sum of its proper divisors (1200435357).

2168869731 is a wasteful number, since it uses less digits than its factorization.

2168869731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7811.

The product of its digits is 870912, while the sum is 51.

The square root of 2168869731 is about 46571.1255071208. The cubic root of 2168869731 is about 1294.4277732034.

It can be divided in two parts, 21688 and 69731, that added together give a palindrome (91419).

The spelling of 2168869731 in words is "two billion, one hundred sixty-eight million, eight hundred sixty-nine thousand, seven hundred thirty-one".