131203242 has 24 divisors (see below), whose sum is σ = 287092260. Its totient is φ = 43300800.

The previous prime is 131203217. The next prime is 131203301. The reversal of 131203242 is 242302131.

It can be written as a sum of positive squares in 2 ways, for example, as 131125401 + 77841 = 11451^2 + 279^2 .

It is a super-2 number, since 2×131203242² = 34428581422621128, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

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 11 ways as a sum of consecutive naturals, for example, 34267 + ... + 37902.

Almost surely, 2^131203242 is an apocalyptic number.

131203242 is an abundant number, since it is smaller than the sum of its proper divisors (155889018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131203242 is a wasteful number, since it uses less digits than its factorization.

131203242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72278 (or 72275 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 131203242 is about 11454.3983691855. The cubic root of 131203242 is about 508.1378224639.

Adding to 131203242 its reverse (242302131), we get a palindrome (373505373).

The spelling of 131203242 in words is "one hundred thirty-one million, two hundred three thousand, two hundred forty-two".