131224542 has 32 divisors (see below), whose sum is σ = 268375680. Its totient is φ = 42762720.

The previous prime is 131224523. The next prime is 131224549. The reversal of 131224542 is 245422131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131224549) 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 15 ways as a sum of consecutive naturals, for example, 64513 + ... + 66515.

It is an arithmetic number, because the mean of its divisors is an integer number (8386740).

Almost surely, 2^131224542 is an apocalyptic number.

131224542 is an abundant number, since it is smaller than the sum of its proper divisors (137151138).

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

131224542 is a wasteful number, since it uses less digits than its factorization.

131224542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2248.

The product of its digits is 1920, while the sum is 24.

The square root of 131224542 is about 11455.3281052967. The cubic root of 131224542 is about 508.1653186086.

Adding to 131224542 its reverse (245422131), we get a palindrome (376646673).

The spelling of 131224542 in words is "one hundred thirty-one million, two hundred twenty-four thousand, five hundred forty-two".