138321151 has 2 divisors, whose sum is σ = 138321152. Its totient is φ = 138321150.

The previous prime is 138321143. The next prime is 138321181. The reversal of 138321151 is 151123831.

It is a weak prime.

It is an emirp because it is prime and its reverse (151123831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138321151 - 2³ = 138321143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138321181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69160575 + 69160576.

It is an arithmetic number, because the mean of its divisors is an integer number (69160576).

Almost surely, 2^138321151 is an apocalyptic number.

138321151 is a deficient number, since it is larger than the sum of its proper divisors (1).

138321151 is an equidigital number, since it uses as much as digits as its factorization.

138321151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720, while the sum is 25.

The square root of 138321151 is about 11761.0012754017. The cubic root of 138321151 is about 517.1654832058.

Adding to 138321151 its reverse (151123831), we get a palindrome (289444982).

The spelling of 138321151 in words is "one hundred thirty-eight million, three hundred twenty-one thousand, one hundred fifty-one".