138825422 has 4 divisors (see below), whose sum is σ = 208238136. Its totient is φ = 69412710.

The previous prime is 138825413. The next prime is 138825433. The reversal of 138825422 is 224528831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 224528831 = 2459 ⋅91309.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 34706354 + ... + 34706357.

It is an arithmetic number, because the mean of its divisors is an integer number (52059534).

Almost surely, 2^138825422 is an apocalyptic number.

138825422 is a deficient number, since it is larger than the sum of its proper divisors (69412714).

138825422 is an equidigital number, since it uses as much as digits as its factorization.

138825422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69412713.

The product of its digits is 30720, while the sum is 35.

The square root of 138825422 is about 11782.4200400427. The cubic root of 138825422 is about 517.7931897551.

The spelling of 138825422 in words is "one hundred thirty-eight million, eight hundred twenty-five thousand, four hundred twenty-two".