131338138 has 4 divisors (see below), whose sum is σ = 197007210. Its totient is φ = 65669068.

The previous prime is 131338093. The next prime is 131338171. The reversal of 131338138 is 831833131.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 87553449 + 43784689 = 9357^2 + 6617^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32834533 + ... + 32834536.

Almost surely, 2^131338138 is an apocalyptic number.

131338138 is a deficient number, since it is larger than the sum of its proper divisors (65669072).

131338138 is an equidigital number, since it uses as much as digits as its factorization.

131338138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65669071.

The product of its digits is 5184, while the sum is 31.

The square root of 131338138 is about 11460.2852495040. The cubic root of 131338138 is about 508.3119093243.

The spelling of 131338138 in words is "one hundred thirty-one million, three hundred thirty-eight thousand, one hundred thirty-eight".