131838242 has 16 divisors (see below), whose sum is σ = 201874680. Its totient is φ = 64551552.

The previous prime is 131838241. The next prime is 131838253. The reversal of 131838242 is 242838131.

It can be written as a sum of positive squares in 4 ways, for example, as 125238481 + 6599761 = 11191^2 + 2569^2 .

It is a junction number, because it is equal to n+sod(n) for n = 131838199 and 131838208.

It is not an unprimeable number, because it can be changed into a prime (131838241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81134 + ... + 82742.

Almost surely, 2^131838242 is an apocalyptic number.

131838242 is a deficient number, since it is larger than the sum of its proper divisors (70036438).

131838242 is a wasteful number, since it uses less digits than its factorization.

131838242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2437.

The product of its digits is 9216, while the sum is 32.

The square root of 131838242 is about 11482.0835217307. The cubic root of 131838242 is about 508.9562686056.

The spelling of 131838242 in words is "one hundred thirty-one million, eight hundred thirty-eight thousand, two hundred forty-two".