131224445 has 32 divisors (see below), whose sum is σ = 182891520. Its totient is φ = 89328640.

The previous prime is 131224441. The next prime is 131224463. The reversal of 131224445 is 544422131.

It is not a de Polignac number, because 131224445 - 2² = 131224441 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131224441) 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 31 ways as a sum of consecutive naturals, for example, 273716 + ... + 274194.

It is an arithmetic number, because the mean of its divisors is an integer number (5715360).

Almost surely, 2^131224445 is an apocalyptic number.

It is an amenable number.

131224445 is a deficient number, since it is larger than the sum of its proper divisors (51667075).

131224445 is a wasteful number, since it uses less digits than its factorization.

131224445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805.

The product of its digits is 3840, while the sum is 26.

The square root of 131224445 is about 11455.3238714582. The cubic root of 131224445 is about 508.1651933981.

Adding to 131224445 its reverse (544422131), we get a palindrome (675646576).

The spelling of 131224445 in words is "one hundred thirty-one million, two hundred twenty-four thousand, four hundred forty-five".