1591138151 has 2 divisors, whose sum is σ = 1591138152. Its totient is φ = 1591138150.

The previous prime is 1591138123. The next prime is 1591138243. The reversal of 1591138151 is 1518311951.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1591138151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1591138051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 795569075 + 795569076.

It is an arithmetic number, because the mean of its divisors is an integer number (795569076).

Almost surely, 2^1591138151 is an apocalyptic number.

1591138151 is a deficient number, since it is larger than the sum of its proper divisors (1).

1591138151 is an equidigital number, since it uses as much as digits as its factorization.

1591138151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5400, while the sum is 35.

The square root of 1591138151 is about 39889.0730777239. The cubic root of 1591138151 is about 1167.4437460343.

The spelling of 1591138151 in words is "one billion, five hundred ninety-one million, one hundred thirty-eight thousand, one hundred fifty-one".