138529315 has 8 divisors (see below), whose sum is σ = 166417488. Its totient is φ = 110701920.

The previous prime is 138529291. The next prime is 138529319. The reversal of 138529315 is 513925831.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 138529315 - 2¹¹ = 138527267 is a prime.

It is a super-2 number, since 2×138529315² = 38380742228738450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138529319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10017 + ... + 19426.

It is an arithmetic number, because the mean of its divisors is an integer number (20802186).

Almost surely, 2^138529315 is an apocalyptic number.

138529315 is a deficient number, since it is larger than the sum of its proper divisors (27888173).

138529315 is an equidigital number, since it uses as much as digits as its factorization.

138529315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30389.

The product of its digits is 32400, while the sum is 37.

The square root of 138529315 is about 11769.8477050470. The cubic root of 138529315 is about 517.4247862248.

The spelling of 138529315 in words is "one hundred thirty-eight million, five hundred twenty-nine thousand, three hundred fifteen".