138313255 has 8 divisors (see below), whose sum is σ = 174711600. Its totient is φ = 104826816.

The previous prime is 138313181. The next prime is 138313271. The reversal of 138313255 is 552313831.

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

It is a cyclic number.

It is not a de Polignac number, because 138313255 - 2⁷ = 138313127 is a prime.

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, 727870 + ... + 728059.

It is an arithmetic number, because the mean of its divisors is an integer number (21838950).

Almost surely, 2^138313255 is an apocalyptic number.

138313255 is a deficient number, since it is larger than the sum of its proper divisors (36398345).

138313255 is a wasteful number, since it uses less digits than its factorization.

138313255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1455953.

The product of its digits is 10800, while the sum is 31.

The square root of 138313255 is about 11760.6655849063. The cubic root of 138313255 is about 517.1556422998.

The spelling of 138313255 in words is "one hundred thirty-eight million, three hundred thirteen thousand, two hundred fifty-five".