138299255 has 4 divisors (see below), whose sum is σ = 165959112. Its totient is φ = 110639400.

The previous prime is 138299221. The next prime is 138299269. The reversal of 138299255 is 552992831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 552992831 = 53 ⋅10433827.

It is not a de Polignac number, because 138299255 - 2¹⁰ = 138298231 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 3 ways as a sum of consecutive naturals, for example, 13829921 + ... + 13829930.

It is an arithmetic number, because the mean of its divisors is an integer number (41489778).

Almost surely, 2^138299255 is an apocalyptic number.

138299255 is a deficient number, since it is larger than the sum of its proper divisors (27659857).

138299255 is an equidigital number, since it uses as much as digits as its factorization.

138299255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27659856.

The product of its digits is 194400, while the sum is 44.

The square root of 138299255 is about 11760.0703654357. The cubic root of 138299255 is about 517.1381929640.

The spelling of 138299255 in words is "one hundred thirty-eight million, two hundred ninety-nine thousand, two hundred fifty-five".