131223124343340 has 144 divisors (see below), whose sum is σ = 415415039693472. Its totient is φ = 34769948668416.

The previous prime is 131223124343323. The next prime is 131223124343341. The reversal of 131223124343340 is 43343421322131.

131223124343340 is a `hidden beast` number, since 1 + 3 + 1 + 2 + 2 + 31 + 243 + 43 + 340 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 131223124343295 and 131223124343304.

It is not an unprimeable number, because it can be changed into a prime (131223124343341) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 85226289 + ... + 86752328.

It is an arithmetic number, because the mean of its divisors is an integer number (2884826664538).

Almost surely, 2^{131223124343340} is an apocalyptic number.

131223124343340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131223124343340 is an abundant number, since it is smaller than the sum of its proper divisors (284191915350132).

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

131223124343340 is a wasteful number, since it uses less digits than its factorization.

131223124343340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171978798 (or 171978784 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 36.

Adding to 131223124343340 its reverse (43343421322131), we get a palindrome (174566545665471).

The spelling of 131223124343340 in words is "one hundred thirty-one trillion, two hundred twenty-three billion, one hundred twenty-four million, three hundred forty-three thousand, three hundred forty".