138255525 has 48 divisors (see below), whose sum is σ = 255340800. Its totient is φ = 73342080.

The previous prime is 138255511. The next prime is 138255527. The reversal of 138255525 is 525552831.

138255525 is a `hidden beast` number, since 1 + 3 + 82 + 55 + 525 = 666.

138255525 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 138255525 - 2¹⁵ = 138222757 is a prime.

It is a super-2 number, since 2×138255525² = 38229180386051250, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 138255525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138255527) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 160897 + ... + 161753.

It is an arithmetic number, because the mean of its divisors is an integer number (5319600).

Almost surely, 2^138255525 is an apocalyptic number.

138255525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138255525 is a deficient number, since it is larger than the sum of its proper divisors (117085275).

138255525 is a wasteful number, since it uses less digits than its factorization.

138255525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1115 (or 1104 counting only the distinct ones).

The product of its digits is 60000, while the sum is 36.

The square root of 138255525 is about 11758.2109608562. The cubic root of 138255525 is about 517.0836811323.

The spelling of 138255525 in words is "one hundred thirty-eight million, two hundred fifty-five thousand, five hundred twenty-five".