133333420240 has 80 divisors (see below), whose sum is σ = 317783160576. Its totient is φ = 51996185600.

The previous prime is 133333420237. The next prime is 133333420243. The reversal of 133333420240 is 42024333331.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (133333420237) and next prime (133333420243).

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 = 133333420199 and 133333420208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133333420243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4942629 + ... + 4969531.

Almost surely, 2^133333420240 is an apocalyptic number.

133333420240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133333420240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158891580288).

133333420240 is an abundant number, since it is smaller than the sum of its proper divisors (184449740336).

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

133333420240 is a wasteful number, since it uses less digits than its factorization.

133333420240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28468 (or 28462 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 28.

Adding to 133333420240 its reverse (42024333331), we get a palindrome (175357753571).

The spelling of 133333420240 in words is "one hundred thirty-three billion, three hundred thirty-three million, four hundred twenty thousand, two hundred forty".