138266015 has 16 divisors (see below), whose sum is σ = 178093728. Its totient is φ = 102675456.

The previous prime is 138265987. The next prime is 138266047. The reversal of 138266015 is 510662831.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 138266015 - 2⁸ = 138265759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4937 + ... + 17346.

It is an arithmetic number, because the mean of its divisors is an integer number (11130858).

Almost surely, 2^138266015 is an apocalyptic number.

138266015 is a deficient number, since it is larger than the sum of its proper divisors (39827713).

138266015 is a wasteful number, since it uses less digits than its factorization.

138266015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22378.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 138266015 is about 11758.6570236571. The cubic root of 138266015 is about 517.0967585376.

The spelling of 138266015 in words is "one hundred thirty-eight million, two hundred sixty-six thousand, fifteen".