138280533 has 16 divisors (see below), whose sum is σ = 199376640. Its totient is φ = 84916736.

The previous prime is 138280517. The next prime is 138280547. The reversal of 138280533 is 335082831.

It is a cyclic number.

It is not a de Polignac number, because 138280533 - 2⁴ = 138280517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 138280494 and 138280503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138280133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26448 + ... + 31241.

It is an arithmetic number, because the mean of its divisors is an integer number (12461040).

Almost surely, 2^138280533 is an apocalyptic number.

It is an amenable number.

138280533 is a deficient number, since it is larger than the sum of its proper divisors (61096107).

138280533 is a wasteful number, since it uses less digits than its factorization.

138280533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57756.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 138280533 is about 11759.2743398562. The cubic root of 138280533 is about 517.1148563761.

The spelling of 138280533 in words is "one hundred thirty-eight million, two hundred eighty thousand, five hundred thirty-three".