133175913 has 32 divisors (see below), whose sum is σ = 201274752. Its totient is φ = 77760000.

The previous prime is 133175899. The next prime is 133175923. The reversal of 133175913 is 319571331.

It is not a de Polignac number, because 133175913 - 2⁶ = 133175849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133175923) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 58038 + ... + 60288.

It is an arithmetic number, because the mean of its divisors is an integer number (6289836).

Almost surely, 2^133175913 is an apocalyptic number.

133175913 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

133175913 is a deficient number, since it is larger than the sum of its proper divisors (68098839).

133175913 is a wasteful number, since it uses less digits than its factorization.

133175913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2345.

The product of its digits is 8505, while the sum is 33.

The square root of 133175913 is about 11540.1868702374. The cubic root of 133175913 is about 510.6718212748.

The spelling of 133175913 in words is "one hundred thirty-three million, one hundred seventy-five thousand, nine hundred thirteen".