133275640 has 16 divisors (see below), whose sum is σ = 299870280. Its totient is φ = 53310240.

The previous prime is 133275613. The next prime is 133275641. The reversal of 133275640 is 46572331.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133275641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1665906 + ... + 1665985.

Almost surely, 2^133275640 is an apocalyptic number.

133275640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133275640 is an abundant number, since it is smaller than the sum of its proper divisors (166594640).

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

133275640 is a wasteful number, since it uses less digits than its factorization.

133275640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3331902 (or 3331898 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 133275640 is about 11544.5069188770. The cubic root of 133275640 is about 510.7992593895.

The spelling of 133275640 in words is "one hundred thirty-three million, two hundred seventy-five thousand, six hundred forty".