131022145544 has 32 divisors (see below), whose sum is σ = 268508390400. Its totient is φ = 59668527360.

The previous prime is 131022145523. The next prime is 131022145547. The reversal of 131022145544 is 445541220131.

It is a self number, because there is not a number n which added to its sum of digits gives 131022145544.

It is not an unprimeable number, because it can be changed into a prime (131022145547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15534464 + ... + 15542895.

It is an arithmetic number, because the mean of its divisors is an integer number (8390887200).

Almost surely, 2^131022145544 is an apocalyptic number.

It is an amenable number.

131022145544 is an abundant number, since it is smaller than the sum of its proper divisors (137486244856).

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

131022145544 is a wasteful number, since it uses less digits than its factorization.

131022145544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31077413 (or 31077409 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 32.

Adding to 131022145544 its reverse (445541220131), we get a palindrome (576563365675).

The spelling of 131022145544 in words is "one hundred thirty-one billion, twenty-two million, one hundred forty-five thousand, five hundred forty-four".