133243431440 has 80 divisors (see below), whose sum is σ = 354098407680. Its totient is φ = 45676807680.

The previous prime is 133243431389. The next prime is 133243431473. The reversal of 133243431440 is 44134342331.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 133243431397 and 133243431406.

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, 5268746 + ... + 5293974.

It is an arithmetic number, because the mean of its divisors is an integer number (4426230096).

Almost surely, 2^133243431440 is an apocalyptic number.

133243431440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133243431440 is an abundant number, since it is smaller than the sum of its proper divisors (220854976240).

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

133243431440 is a wasteful number, since it uses less digits than its factorization.

133243431440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34680 (or 34674 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 32.

Adding to 133243431440 its reverse (44134342331), we get a palindrome (177377773771).

The spelling of 133243431440 in words is "one hundred thirty-three billion, two hundred forty-three million, four hundred thirty-one thousand, four hundred forty".