131224043520 has 504 divisors, whose sum is σ = 476338489536. Its totient is φ = 34653339648.

The previous prime is 131224043479. The next prime is 131224043521. The reversal of 131224043520 is 25340422131.

131224043520 is a `hidden beast` number, since 1 + 3 + 1 + 224 + 0 + 435 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (131224043521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1274019789 + ... + 1274019891.

Almost surely, 2^131224043520 is an apocalyptic number.

131224043520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131224043520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (238169244768).

131224043520 is an abundant number, since it is smaller than the sum of its proper divisors (345114446016).

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

131224043520 is an frugal number, since it uses more digits than its factorization.

131224043520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163 (or 113 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 131224043520 its reverse (25340422131), we get a palindrome (156564465651).

The spelling of 131224043520 in words is "one hundred thirty-one billion, two hundred twenty-four million, forty-three thousand, five hundred twenty".