2105388931 has 2 divisors, whose sum is σ = 2105388932. Its totient is φ = 2105388930.

The previous prime is 2105388913. The next prime is 2105388941. The reversal of 2105388931 is 1398835012.

Together with previous prime (2105388913) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2105388931 - 2⁵ = 2105388899 is a prime.

It is a super-2 number, since 2×2105388931² = 8865325101554645522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2105388941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052694465 + 1052694466.

It is an arithmetic number, because the mean of its divisors is an integer number (1052694466).

Almost surely, 2^2105388931 is an apocalyptic number.

2105388931 is a deficient number, since it is larger than the sum of its proper divisors (1).

2105388931 is an equidigital number, since it uses as much as digits as its factorization.

2105388931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 2105388931 is about 45884.5173342817. The cubic root of 2105388931 is about 1281.6736186675.

The spelling of 2105388931 in words is "two billion, one hundred five million, three hundred eighty-eight thousand, nine hundred thirty-one".