138525554 has 8 divisors (see below), whose sum is σ = 220011228. Its totient is φ = 65188480.

The previous prime is 138525553. The next prime is 138525559. The reversal of 138525554 is 455525831.

138525554 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 131905225 + 6620329 = 11485^2 + 2573^2 .

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

It is a super-2 number, since 2×138525554² = 38378658222013832, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (138525553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2037107 + ... + 2037174.

Almost surely, 2^138525554 is an apocalyptic number.

138525554 is a deficient number, since it is larger than the sum of its proper divisors (81485674).

138525554 is a wasteful number, since it uses less digits than its factorization.

138525554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4074300.

The product of its digits is 120000, while the sum is 38.

The square root of 138525554 is about 11769.6879312920. The cubic root of 138525554 is about 517.4201035764.

The spelling of 138525554 in words is "one hundred thirty-eight million, five hundred twenty-five thousand, five hundred fifty-four".