131220440224 has 12 divisors (see below), whose sum is σ = 258340241754. Its totient is φ = 65610220096.

The previous prime is 131220440207. The next prime is 131220440227. The reversal of 131220440224 is 422044022131.

It can be written as a sum of positive squares in only one way, i.e., 103856663824 + 27363776400 = 322268^2 + 165420^2 .

It is not an unprimeable number, because it can be changed into a prime (131220440227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2050319347 + ... + 2050319410.

Almost surely, 2^131220440224 is an apocalyptic number.

It is an amenable number.

131220440224 is a deficient number, since it is larger than the sum of its proper divisors (127119801530).

131220440224 is an equidigital number, since it uses as much as digits as its factorization.

131220440224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4100638767 (or 4100638759 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 131220440224 its reverse (422044022131), we get a palindrome (553264462355).

The spelling of 131220440224 in words is "one hundred thirty-one billion, two hundred twenty million, four hundred forty thousand, two hundred twenty-four".