2158771201 has 2 divisors, whose sum is σ = 2158771202. Its totient is φ = 2158771200.

The previous prime is 2158771193. The next prime is 2158771207. The reversal of 2158771201 is 1021778512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1706103025 + 452668176 = 41305^2 + 21276^2 .

It is a cyclic number.

It is not a de Polignac number, because 2158771201 - 2³ = 2158771193 is a prime.

It is not a weakly prime, because it can be changed into another prime (2158771207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1079385600 + 1079385601.

It is an arithmetic number, because the mean of its divisors is an integer number (1079385601).

Almost surely, 2^2158771201 is an apocalyptic number.

It is an amenable number.

2158771201 is a deficient number, since it is larger than the sum of its proper divisors (1).

2158771201 is an equidigital number, since it uses as much as digits as its factorization.

2158771201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7840, while the sum is 34.

The square root of 2158771201 is about 46462.5785014134. The cubic root of 2158771201 is about 1292.4156409293.

The spelling of 2158771201 in words is "two billion, one hundred fifty-eight million, seven hundred seventy-one thousand, two hundred one".