138487255 has 16 divisors (see below), whose sum is σ = 174472704. Its totient is φ = 105323680.

The previous prime is 138487249. The next prime is 138487259. The reversal of 138487255 is 552784831.

It is not a de Polignac number, because 138487255 - 2³ = 138487247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138487259) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15600 + ... + 22810.

It is an arithmetic number, because the mean of its divisors is an integer number (10904544).

Almost surely, 2^138487255 is an apocalyptic number.

138487255 is a deficient number, since it is larger than the sum of its proper divisors (35985449).

138487255 is a wasteful number, since it uses less digits than its factorization.

138487255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7406.

The product of its digits is 268800, while the sum is 43.

The square root of 138487255 is about 11768.0608003188. The cubic root of 138487255 is about 517.3724144232.

The spelling of 138487255 in words is "one hundred thirty-eight million, four hundred eighty-seven thousand, two hundred fifty-five".