138232511 has 2 divisors, whose sum is σ = 138232512. Its totient is φ = 138232510.

The previous prime is 138232483. The next prime is 138232547. The reversal of 138232511 is 115232831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138232511 - 2²² = 134038207 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 (138232411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69116255 + 69116256.

It is an arithmetic number, because the mean of its divisors is an integer number (69116256).

Almost surely, 2^138232511 is an apocalyptic number.

138232511 is a deficient number, since it is larger than the sum of its proper divisors (1).

138232511 is an equidigital number, since it uses as much as digits as its factorization.

138232511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 26.

The square root of 138232511 is about 11757.2322848534. The cubic root of 138232511 is about 517.0549883086.

The spelling of 138232511 in words is "one hundred thirty-eight million, two hundred thirty-two thousand, five hundred eleven".