133531121532 has 24 divisors (see below), whose sum is σ = 316853510400. Its totient is φ = 43755960496.

The previous prime is 133531121509. The next prime is 133531121567. The reversal of 133531121532 is 235121135331.

It is a self number, because there is not a number n which added to its sum of digits gives 133531121532.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94300932 + ... + 94302347.

It is an arithmetic number, because the mean of its divisors is an integer number (13202229600).

Almost surely, 2^133531121532 is an apocalyptic number.

133531121532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

133531121532 is an abundant number, since it is smaller than the sum of its proper divisors (183322388868).

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

133531121532 is a wasteful number, since it uses less digits than its factorization.

133531121532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188603345 (or 188603343 counting only the distinct ones).

The product of its digits is 8100, while the sum is 30.

Adding to 133531121532 its reverse (235121135331), we get a palindrome (368652256863).

The spelling of 133531121532 in words is "one hundred thirty-three billion, five hundred thirty-one million, one hundred twenty-one thousand, five hundred thirty-two".