2171461157 has 2 divisors, whose sum is σ = 2171461158. Its totient is φ = 2171461156.

The previous prime is 2171461133. The next prime is 2171461169. The reversal of 2171461157 is 7511641712.

2171461157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1984346116 + 187115041 = 44546^2 + 13679^2 .

It is a cyclic number.

It is not a de Polignac number, because 2171461157 - 2⁶ = 2171461093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2171461757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1085730578 + 1085730579.

It is an arithmetic number, because the mean of its divisors is an integer number (1085730579).

Almost surely, 2^2171461157 is an apocalyptic number.

It is an amenable number.

2171461157 is a deficient number, since it is larger than the sum of its proper divisors (1).

2171461157 is an equidigital number, since it uses as much as digits as its factorization.

2171461157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11760, while the sum is 35.

The square root of 2171461157 is about 46598.9394407212. The cubic root of 2171461157 is about 1294.9431074721.

The spelling of 2171461157 in words is "two billion, one hundred seventy-one million, four hundred sixty-one thousand, one hundred fifty-seven".