2158748971 has 2 divisors, whose sum is σ = 2158748972. Its totient is φ = 2158748970.

The previous prime is 2158748939. The next prime is 2158748981. The reversal of 2158748971 is 1798478512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2158748971 - 2⁵ = 2158748939 is a prime.

It is not a weakly prime, because it can be changed into another prime (2158748981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1079374485 + 1079374486.

It is an arithmetic number, because the mean of its divisors is an integer number (1079374486).

Almost surely, 2^2158748971 is an apocalyptic number.

2158748971 is a deficient number, since it is larger than the sum of its proper divisors (1).

2158748971 is an equidigital number, since it uses as much as digits as its factorization.

2158748971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1128960, while the sum is 52.

The square root of 2158748971 is about 46462.3392760201. The cubic root of 2158748971 is about 1292.4112046867.

The spelling of 2158748971 in words is "two billion, one hundred fifty-eight million, seven hundred forty-eight thousand, nine hundred seventy-one".