2138830157 has 2 divisors, whose sum is σ = 2138830158. Its totient is φ = 2138830156.

The previous prime is 2138830153. The next prime is 2138830201. The reversal of 2138830157 is 7510388312.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2138692516 + 137641 = 46246^2 + 371^2 .

It is a cyclic number.

It is not a de Polignac number, because 2138830157 - 2² = 2138830153 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2138830157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2138830153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1069415078 + 1069415079.

It is an arithmetic number, because the mean of its divisors is an integer number (1069415079).

Almost surely, 2^2138830157 is an apocalyptic number.

It is an amenable number.

2138830157 is a deficient number, since it is larger than the sum of its proper divisors (1).

2138830157 is an equidigital number, since it uses as much as digits as its factorization.

2138830157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 2138830157 is about 46247.4881155723. The cubic root of 2138830157 is about 1288.4238822318.

The spelling of 2138830157 in words is "two billion, one hundred thirty-eight million, eight hundred thirty thousand, one hundred fifty-seven".