131533142220444 has 48 divisors (see below), whose sum is σ = 314281003373568. Its totient is φ = 42796477213248.

The previous prime is 131533142220379. The next prime is 131533142220479. The reversal of 131533142220444 is 444022241335131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 312409992 + ... + 312830735.

It is an arithmetic number, because the mean of its divisors is an integer number (6547520903616).

Almost surely, 2^{131533142220444} is an apocalyptic number.

It is an amenable number.

131533142220444 is an abundant number, since it is smaller than the sum of its proper divisors (182747861153124).

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

131533142220444 is a wasteful number, since it uses less digits than its factorization.

131533142220444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625241154 (or 625241152 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 39.

Adding to 131533142220444 its reverse (444022241335131), we get a palindrome (575555383555575).

The spelling of 131533142220444 in words is "one hundred thirty-one trillion, five hundred thirty-three billion, one hundred forty-two million, two hundred twenty thousand, four hundred forty-four".