138311131 has 8 divisors (see below), whose sum is σ = 158319360. Its totient is φ = 118365288.

The previous prime is 138311111. The next prime is 138311149. The reversal of 138311131 is 131113831.

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 138311131 - 2²⁵ = 104756699 is a prime.

It is a super-2 number, since 2×138311131² = 38259937916998322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138311101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10741 + ... + 19798.

It is an arithmetic number, because the mean of its divisors is an integer number (19789920).

Almost surely, 2^138311131 is an apocalyptic number.

138311131 is a deficient number, since it is larger than the sum of its proper divisors (20008229).

138311131 is an equidigital number, since it uses as much as digits as its factorization.

138311131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31193.

The product of its digits is 216, while the sum is 22.

The square root of 138311131 is about 11760.5752835480. The cubic root of 138311131 is about 517.1529950620.

Adding to 138311131 its reverse (131113831), we get a palindrome (269424962).

The spelling of 138311131 in words is "one hundred thirty-eight million, three hundred eleven thousand, one hundred thirty-one".