2115387871 has 2 divisors, whose sum is σ = 2115387872. Its totient is φ = 2115387870.

The previous prime is 2115387847. The next prime is 2115387893. The reversal of 2115387871 is 1787835112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2115387871 - 2⁹ = 2115387359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2115388871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1057693935 + 1057693936.

It is an arithmetic number, because the mean of its divisors is an integer number (1057693936).

Almost surely, 2^2115387871 is an apocalyptic number.

2115387871 is a deficient number, since it is larger than the sum of its proper divisors (1).

2115387871 is an equidigital number, since it uses as much as digits as its factorization.

2115387871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 94080, while the sum is 43.

The square root of 2115387871 is about 45993.3459426470. The cubic root of 2115387871 is about 1283.6993953354.

The spelling of 2115387871 in words is "two billion, one hundred fifteen million, three hundred eighty-seven thousand, eight hundred seventy-one".