138203158 has 8 divisors (see below), whose sum is σ = 207389952. Its totient is φ = 69073176.

The previous prime is 138203147. The next prime is 138203179. The reversal of 138203158 is 851302831.

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

It is a super-2 number, since 2×138203158² = 38200225762345928, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 7485 + ... + 18232.

It is an arithmetic number, because the mean of its divisors is an integer number (25923744).

Almost surely, 2^138203158 is an apocalyptic number.

138203158 is a deficient number, since it is larger than the sum of its proper divisors (69186794).

138203158 is a wasteful number, since it uses less digits than its factorization.

138203158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28406.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 138203158 is about 11755.9839230921. The cubic root of 138203158 is about 517.0183876822.

Adding to 138203158 its reverse (851302831), we get a palindrome (989505989).

The spelling of 138203158 in words is "one hundred thirty-eight million, two hundred three thousand, one hundred fifty-eight".