131022355440 has 80 divisors (see below), whose sum is σ = 406883556000. Its totient is φ = 34877853696.

The previous prime is 131022355421. The next prime is 131022355469. The reversal of 131022355440 is 44553220131.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 131022355398 and 131022355407.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 343165 + ... + 616284.

It is an arithmetic number, because the mean of its divisors is an integer number (5086044450).

Almost surely, 2^131022355440 is an apocalyptic number.

131022355440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131022355440 is an abundant number, since it is smaller than the sum of its proper divisors (275861200560).

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

131022355440 is a wasteful number, since it uses less digits than its factorization.

131022355440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960034 (or 960028 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 131022355440 its reverse (44553220131), we get a palindrome (175575575571).

The spelling of 131022355440 in words is "one hundred thirty-one billion, twenty-two million, three hundred fifty-five thousand, four hundred forty".