138510375 has 16 divisors (see below), whose sum is σ = 230481888. Its totient is φ = 73872000.

The previous prime is 138510329. The next prime is 138510377. The reversal of 138510375 is 573015831.

It is not a de Polignac number, because 138510375 - 2⁶ = 138510311 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138510377) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 184306 + ... + 185055.

It is an arithmetic number, because the mean of its divisors is an integer number (14405118).

Almost surely, 2^138510375 is an apocalyptic number.

138510375 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

138510375 is a deficient number, since it is larger than the sum of its proper divisors (91971513).

138510375 is an equidigital number, since it uses as much as digits as its factorization.

138510375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369379 (or 369369 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 33.

The square root of 138510375 is about 11769.0430791972. The cubic root of 138510375 is about 517.4012040391.

The spelling of 138510375 in words is "one hundred thirty-eight million, five hundred ten thousand, three hundred seventy-five".