2100431305 has 12 divisors (see below), whose sum is σ = 2932030980. Its totient is φ = 1440295584.

The previous prime is 2100431303. The next prime is 2100431321. The reversal of 2100431305 is 5031340012.

It can be written as a sum of positive squares in 2 ways, for example, as 1062238464 + 1038192841 = 32592^2 + 32221^2 .

It is not a de Polignac number, because 2100431305 - 2¹ = 2100431303 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2100431303) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4286350 + ... + 4286839.

It is an arithmetic number, because the mean of its divisors is an integer number (244335915).

Almost surely, 2^2100431305 is an apocalyptic number.

It is an amenable number.

2100431305 is a deficient number, since it is larger than the sum of its proper divisors (831599675).

2100431305 is an equidigital number, since it uses as much as digits as its factorization.

2100431305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8573208 (or 8573201 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 2100431305 is about 45830.4626313111. The cubic root of 2100431305 is about 1280.6668288587. Note that the first 3 decimals are identical.

Adding to 2100431305 its reverse (5031340012), we get a palindrome (7131771317).

The spelling of 2100431305 in words is "two billion, one hundred million, four hundred thirty-one thousand, three hundred five".