138110813531 has 2 divisors, whose sum is σ = 138110813532. Its totient is φ = 138110813530.

The previous prime is 138110813473. The next prime is 138110813537. The reversal of 138110813531 is 135318011831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 138110813531 - 2³⁴ = 120930944347 is a prime.

It is a super-2 number, since 2×138110813531² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 138110813491 and 138110813500.

It is not a weakly prime, because it can be changed into another prime (138110813537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69055406765 + 69055406766.

It is an arithmetic number, because the mean of its divisors is an integer number (69055406766).

Almost surely, 2^138110813531 is an apocalyptic number.

138110813531 is a deficient number, since it is larger than the sum of its proper divisors (1).

138110813531 is an equidigital number, since it uses as much as digits as its factorization.

138110813531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 35.

The spelling of 138110813531 in words is "one hundred thirty-eight billion, one hundred ten million, eight hundred thirteen thousand, five hundred thirty-one".