2130156857 has 2 divisors, whose sum is σ = 2130156858. Its totient is φ = 2130156856.

The previous prime is 2130156841. The next prime is 2130156871. The reversal of 2130156857 is 7586510312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1825340176 + 304816681 = 42724^2 + 17459^2 .

It is a cyclic number.

It is not a de Polignac number, because 2130156857 - 2⁴ = 2130156841 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2130156857.

It is not a weakly prime, because it can be changed into another prime (2130156817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065078428 + 1065078429.

It is an arithmetic number, because the mean of its divisors is an integer number (1065078429).

Almost surely, 2^2130156857 is an apocalyptic number.

It is an amenable number.

2130156857 is a deficient number, since it is larger than the sum of its proper divisors (1).

2130156857 is an equidigital number, since it uses as much as digits as its factorization.

2130156857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 2130156857 is about 46153.6223605472. The cubic root of 2130156857 is about 1286.6799341418.

The spelling of 2130156857 in words is "two billion, one hundred thirty million, one hundred fifty-six thousand, eight hundred fifty-seven".