2102431139 has 2 divisors, whose sum is σ = 2102431140. Its totient is φ = 2102431138.

The previous prime is 2102431099. The next prime is 2102431141. The reversal of 2102431139 is 9311342012.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2102431139 is a prime.

Together with 2102431141, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2102431039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051215569 + 1051215570.

It is an arithmetic number, because the mean of its divisors is an integer number (1051215570).

Almost surely, 2^2102431139 is an apocalyptic number.

2102431139 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102431139 is an equidigital number, since it uses as much as digits as its factorization.

2102431139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 2102431139 is about 45852.2751780105. The cubic root of 2102431139 is about 1281.0731436111.

The spelling of 2102431139 in words is "two billion, one hundred two million, four hundred thirty-one thousand, one hundred thirty-nine".