131333242 has 4 divisors (see below), whose sum is σ = 196999866. Its totient is φ = 65666620.

The previous prime is 131333231. The next prime is 131333249. The reversal of 131333242 is 242333131.

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., 97239321 + 34093921 = 9861^2 + 5839^2 .

It is not an unprimeable number, because it can be changed into a prime (131333249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32833309 + ... + 32833312.

Almost surely, 2^131333242 is an apocalyptic number.

131333242 is a deficient number, since it is larger than the sum of its proper divisors (65666624).

131333242 is an equidigital number, since it uses as much as digits as its factorization.

131333242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65666623.

The product of its digits is 1296, while the sum is 22.

The square root of 131333242 is about 11460.0716402647. The cubic root of 131333242 is about 508.3055929919.

Adding to 131333242 its reverse (242333131), we get a palindrome (373666373).

The spelling of 131333242 in words is "one hundred thirty-one million, three hundred thirty-three thousand, two hundred forty-two".