133611075 has 72 divisors (see below), whose sum is σ = 272982528. Its totient is φ = 61885440.

The previous prime is 133611073. The next prime is 133611089. The reversal of 133611075 is 570116331.

It is not a de Polignac number, because 133611075 - 2¹ = 133611073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133611073) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 48382 + ... + 51068.

It is an arithmetic number, because the mean of its divisors is an integer number (3791424).

Almost surely, 2^133611075 is an apocalyptic number.

133611075 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

133611075 is an abundant number, since it is smaller than the sum of its proper divisors (139371453).

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

133611075 is a wasteful number, since it uses less digits than its factorization.

133611075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2733 (or 2725 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

The square root of 133611075 is about 11559.0256942357. The cubic root of 133611075 is about 511.2274356726.

The spelling of 133611075 in words is "one hundred thirty-three million, six hundred eleven thousand, seventy-five".