2105171459 has 2 divisors, whose sum is σ = 2105171460. Its totient is φ = 2105171458.

The previous prime is 2105171447. The next prime is 2105171491. The reversal of 2105171459 is 9541715012.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2105171459 - 2²⁸ = 1836736003 is a prime.

It is not a weakly prime, because it can be changed into another prime (2105171429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052585729 + 1052585730.

It is an arithmetic number, because the mean of its divisors is an integer number (1052585730).

Almost surely, 2^2105171459 is an apocalyptic number.

2105171459 is a deficient number, since it is larger than the sum of its proper divisors (1).

2105171459 is an equidigital number, since it uses as much as digits as its factorization.

2105171459 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12600, while the sum is 35.

The square root of 2105171459 is about 45882.1474976924. The cubic root of 2105171459 is about 1281.6294878312.

The spelling of 2105171459 in words is "two billion, one hundred five million, one hundred seventy-one thousand, four hundred fifty-nine".