138255603 has 8 divisors (see below), whose sum is σ = 184451328. Its totient is φ = 92115144.

The previous prime is 138255581. The next prime is 138255617. The reversal of 138255603 is 306552831.

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

It is not a de Polignac number, because 138255603 - 2⁶ = 138255539 is a prime.

It is a super-2 number, since 2×138255603² = 38229223521787218, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (138255683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7575 + ... + 18272.

It is an arithmetic number, because the mean of its divisors is an integer number (23056416).

Almost surely, 2^138255603 is an apocalyptic number.

138255603 is a deficient number, since it is larger than the sum of its proper divisors (46195725).

138255603 is a wasteful number, since it uses less digits than its factorization.

138255603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27633.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 138255603 is about 11758.2142776869. The cubic root of 138255603 is about 517.0837783738.

The spelling of 138255603 in words is "one hundred thirty-eight million, two hundred fifty-five thousand, six hundred three".