138750522 has 8 divisors (see below), whose sum is σ = 277501056. Its totient is φ = 46250172.

The previous prime is 138750517. The next prime is 138750523. The reversal of 138750522 is 225057831.

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

138750522 is an admirable number.

It is a super-3 number, since 3×138750522³ (a number of 25 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (138750523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11562538 + ... + 11562549.

It is an arithmetic number, because the mean of its divisors is an integer number (34687632).

Almost surely, 2^138750522 is an apocalyptic number.

138750522 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138750522 is a wasteful number, since it uses less digits than its factorization.

138750522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23125092.

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 138750522 is about 11779.2411470349. The cubic root of 138750522 is about 517.7000519464.

The spelling of 138750522 in words is "one hundred thirty-eight million, seven hundred fifty thousand, five hundred twenty-two".