131533440521533 has 32 divisors (see below), whose sum is σ = 142797947846400. Its totient is φ = 120672749223936.

The previous prime is 131533440521443. The next prime is 131533440521569. The reversal of 131533440521533 is 335125044335131.

It is a cyclic number.

It is not a de Polignac number, because 131533440521533 - 2³⁷ = 131396001568061 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131533440521533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131533440521333) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 721791133 + ... + 721973341.

It is an arithmetic number, because the mean of its divisors is an integer number (4462435870200).

Almost surely, 2^{131533440521533} is an apocalyptic number.

It is an amenable number.

131533440521533 is a deficient number, since it is larger than the sum of its proper divisors (11264507324867).

131533440521533 is a wasteful number, since it uses less digits than its factorization.

131533440521533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184261.

The product of its (nonzero) digits is 972000, while the sum is 43.

Adding to 131533440521533 its reverse (335125044335131), we get a palindrome (466658484856664).

The spelling of 131533440521533 in words is "one hundred thirty-one trillion, five hundred thirty-three billion, four hundred forty million, five hundred twenty-one thousand, five hundred thirty-three".