131511331144 has 32 divisors (see below), whose sum is σ = 247013776800. Its totient is φ = 65641095040.

The previous prime is 131511331141. The next prime is 131511331199. The reversal of 131511331144 is 441133115131.

It is not an unprimeable number, because it can be changed into a prime (131511331141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12571164 + ... + 12581620.

It is an arithmetic number, because the mean of its divisors is an integer number (7719180525).

Almost surely, 2^131511331144 is an apocalyptic number.

It is an amenable number.

131511331144 is a deficient number, since it is larger than the sum of its proper divisors (115502445656).

131511331144 is a wasteful number, since it uses less digits than its factorization.

131511331144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13053 (or 13049 counting only the distinct ones).

The product of its digits is 2160, while the sum is 28.

Adding to 131511331144 its reverse (441133115131), we get a palindrome (572644446275).

The spelling of 131511331144 in words is "one hundred thirty-one billion, five hundred eleven million, three hundred thirty-one thousand, one hundred forty-four".