133281512 has 48 divisors (see below), whose sum is σ = 309284640. Its totient is φ = 52723008.

The previous prime is 133281503. The next prime is 133281521. The reversal of 133281512 is 215182331.

133281512 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (133281503) and next prime (133281521).

It is a super-2 number, since 2×133281512² = 35527922882012288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 2423 + ... + 16505.

It is an arithmetic number, because the mean of its divisors is an integer number (6443430).

Almost surely, 2^133281512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133281512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154642320).

133281512 is an abundant number, since it is smaller than the sum of its proper divisors (176003128).

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

133281512 is a wasteful number, since it uses less digits than its factorization.

133281512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14122 (or 14105 counting only the distinct ones).

The product of its digits is 1440, while the sum is 26.

The square root of 133281512 is about 11544.7612361625. The cubic root of 133281512 is about 510.8067610584.

The spelling of 133281512 in words is "one hundred thirty-three million, two hundred eighty-one thousand, five hundred twelve".