133816540 has 96 divisors (see below), whose sum is σ = 335301120. Its totient is φ = 44217600.

The previous prime is 133816517. The next prime is 133816547. The reversal of 133816540 is 45618331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133816547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 202731 + ... + 203389.

It is an arithmetic number, because the mean of its divisors is an integer number (3492720).

Almost surely, 2^133816540 is an apocalyptic number.

133816540 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 133816540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167650560).

133816540 is an abundant number, since it is smaller than the sum of its proper divisors (201484580).

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

133816540 is a wasteful number, since it uses less digits than its factorization.

133816540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763 (or 761 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 133816540 is about 11567.9099235774. The cubic root of 133816540 is about 511.4893539514.

The spelling of 133816540 in words is "one hundred thirty-three million, eight hundred sixteen thousand, five hundred forty".