138302553 has 16 divisors (see below), whose sum is σ = 190060416. Its totient is φ = 89400960.

The previous prime is 138302477. The next prime is 138302569. The reversal of 138302553 is 355203831.

It is not a de Polignac number, because 138302553 - 2¹⁰ = 138301529 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138302553.

It is not an unprimeable number, because it can be changed into a prime (138302453) 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 15 ways as a sum of consecutive naturals, for example, 17175 + ... + 23907.

It is an arithmetic number, because the mean of its divisors is an integer number (11878776).

Almost surely, 2^138302553 is an apocalyptic number.

It is an amenable number.

138302553 is a deficient number, since it is larger than the sum of its proper divisors (51757863).

138302553 is a wasteful number, since it uses less digits than its factorization.

138302553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6944.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 138302553 is about 11760.2105848492. The cubic root of 138302553 is about 517.1423036350.

The spelling of 138302553 in words is "one hundred thirty-eight million, three hundred two thousand, five hundred fifty-three".