138442233 has 8 divisors (see below), whose sum is σ = 184644000. Its totient is φ = 92267648.

The previous prime is 138442231. The next prime is 138442253. The reversal of 138442233 is 332244831.

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

It is a cyclic number.

It is not a de Polignac number, because 138442233 - 2¹ = 138442231 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138442233.

It is not an unprimeable number, because it can be changed into a prime (138442231) 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 7 ways as a sum of consecutive naturals, for example, 16618 + ... + 23516.

It is an arithmetic number, because the mean of its divisors is an integer number (23080500).

Almost surely, 2^138442233 is an apocalyptic number.

It is an amenable number.

138442233 is a deficient number, since it is larger than the sum of its proper divisors (46201767).

138442233 is an equidigital number, since it uses as much as digits as its factorization.

138442233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13591.

The product of its digits is 13824, while the sum is 30.

The square root of 138442233 is about 11766.1477553191. The cubic root of 138442233 is about 517.3163426798.

The spelling of 138442233 in words is "one hundred thirty-eight million, four hundred forty-two thousand, two hundred thirty-three".