133531405431500 has 96 divisors (see below), whose sum is σ = 291932105337600. Its totient is φ = 53357731257600.

The previous prime is 133531405431443. The next prime is 133531405431503. The reversal of 133531405431500 is 5134504135331.

It is not an unprimeable number, because it can be changed into a prime (133531405431503) 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, 2258658941 + ... + 2258718059.

It is an arithmetic number, because the mean of its divisors is an integer number (3040959430600).

Almost surely, 2^{133531405431500} is an apocalyptic number.

133531405431500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133531405431500 is an abundant number, since it is smaller than the sum of its proper divisors (158400699906100).

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

133531405431500 is a wasteful number, since it uses less digits than its factorization.

133531405431500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63700 (or 63688 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 38.

Adding to 133531405431500 its reverse (5134504135331), we get a palindrome (138665909566831).

The spelling of 133531405431500 in words is "one hundred thirty-three trillion, five hundred thirty-one billion, four hundred five million, four hundred thirty-one thousand, five hundred".