138315065 has 48 divisors (see below), whose sum is σ = 203354112. Its totient is φ = 88397568.

The previous prime is 138315059. The next prime is 138315083. The reversal of 138315065 is 560513831.

It is not a de Polignac number, because 138315065 - 2⁸ = 138314809 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1089032 + ... + 1089158.

It is an arithmetic number, because the mean of its divisors is an integer number (4236544).

Almost surely, 2^138315065 is an apocalyptic number.

It is an amenable number.

138315065 is a deficient number, since it is larger than the sum of its proper divisors (65039047).

138315065 is a wasteful number, since it uses less digits than its factorization.

138315065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234 (or 205 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 138315065 is about 11760.7425360816. The cubic root of 138315065 is about 517.1578981637.

Adding to 138315065 its reverse (560513831), we get a palindrome (698828896).

The spelling of 138315065 in words is "one hundred thirty-eight million, three hundred fifteen thousand, sixty-five".