131223081772 has 96 divisors (see below), whose sum is σ = 249243008000. Its totient is φ = 60264622080.

The previous prime is 131223081767. The next prime is 131223081779. The reversal of 131223081772 is 277180322131.

It is not an unprimeable number, because it can be changed into a prime (131223081779) 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, 80951122 + ... + 80952742.

Almost surely, 2^131223081772 is an apocalyptic number.

It is an amenable number.

131223081772 is a deficient number, since it is larger than the sum of its proper divisors (118019926228).

131223081772 is a wasteful number, since it uses less digits than its factorization.

131223081772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1959 (or 1957 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 37.

The spelling of 131223081772 in words is "one hundred thirty-one billion, two hundred twenty-three million, eighty-one thousand, seven hundred seventy-two".