138203255 has 8 divisors (see below), whose sum is σ = 166031424. Its totient is φ = 110437600.

The previous prime is 138203189. The next prime is 138203269. The reversal of 138203255 is 552302831.

138203255 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 138203255 - 2²⁰ = 137154679 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 7 ways as a sum of consecutive naturals, for example, 10616 + ... + 19725.

It is an arithmetic number, because the mean of its divisors is an integer number (20753928).

Almost surely, 2^138203255 is an apocalyptic number.

138203255 is a deficient number, since it is larger than the sum of its proper divisors (27828169).

138203255 is an equidigital number, since it uses as much as digits as its factorization.

138203255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31257.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 138203255 is about 11755.9880486499. The cubic root of 138203255 is about 517.0185086413.

The spelling of 138203255 in words is "one hundred thirty-eight million, two hundred three thousand, two hundred fifty-five".