138226529 has 4 divisors (see below), whose sum is σ = 157973184. Its totient is φ = 118479876.

The previous prime is 138226477. The next prime is 138226547. The reversal of 138226529 is 925622831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 138226529 - 2¹⁶ = 138160993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 138226492 and 138226501.

It is not an unprimeable number, because it can be changed into a prime (138226589) 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, 9873317 + ... + 9873330.

It is an arithmetic number, because the mean of its divisors is an integer number (39493296).

Almost surely, 2^138226529 is an apocalyptic number.

It is an amenable number.

138226529 is a deficient number, since it is larger than the sum of its proper divisors (19746655).

138226529 is an equidigital number, since it uses as much as digits as its factorization.

138226529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19746654.

The product of its digits is 51840, while the sum is 38.

The square root of 138226529 is about 11756.9778854942. The cubic root of 138226529 is about 517.0475296977.

The spelling of 138226529 in words is "one hundred thirty-eight million, two hundred twenty-six thousand, five hundred twenty-nine".