138811151 has 2 divisors, whose sum is σ = 138811152. Its totient is φ = 138811150.

The previous prime is 138811147. The next prime is 138811159. The reversal of 138811151 is 151118831.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138811151 - 2² = 138811147 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138811159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69405575 + 69405576.

It is an arithmetic number, because the mean of its divisors is an integer number (69405576).

Almost surely, 2^138811151 is an apocalyptic number.

138811151 is a deficient number, since it is larger than the sum of its proper divisors (1).

138811151 is an equidigital number, since it uses as much as digits as its factorization.

138811151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960, while the sum is 29.

The square root of 138811151 is about 11781.8144188406. The cubic root of 138811151 is about 517.7754464155.

Adding to 138811151 its reverse (151118831), we get a palindrome (289929982).

The spelling of 138811151 in words is "one hundred thirty-eight million, eight hundred eleven thousand, one hundred fifty-one".