138787526231 has 2 divisors, whose sum is σ = 138787526232. Its totient is φ = 138787526230.

The previous prime is 138787526201. The next prime is 138787526249. The reversal of 138787526231 is 132625787831.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138787526231 is a prime.

It is a super-2 number, since 2×138787526231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138787526201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69393763115 + 69393763116.

It is an arithmetic number, because the mean of its divisors is an integer number (69393763116).

Almost surely, 2^138787526231 is an apocalyptic number.

138787526231 is a deficient number, since it is larger than the sum of its proper divisors (1).

138787526231 is an equidigital number, since it uses as much as digits as its factorization.

138787526231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3386880, while the sum is 53.

The spelling of 138787526231 in words is "one hundred thirty-eight billion, seven hundred eighty-seven million, five hundred twenty-six thousand, two hundred thirty-one".