133375217 has 6 divisors (see below), whose sum is σ = 141271254. Its totient is φ = 125484800.

The previous prime is 133375213. The next prime is 133375241. The reversal of 133375217 is 712573331.

It can be written as a sum of positive squares in 3 ways, for example, as 36529936 + 96845281 = 6044^2 + 9841^2 .

It is not a de Polignac number, because 133375217 - 2² = 133375213 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133375211) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 46217 + ... + 49017.

It is an arithmetic number, because the mean of its divisors is an integer number (23545209).

Almost surely, 2^133375217 is an apocalyptic number.

133375217 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

133375217 is a deficient number, since it is larger than the sum of its proper divisors (7896037).

133375217 is an frugal number, since it uses more digits than its factorization.

133375217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5619 (or 2818 counting only the distinct ones).

The product of its digits is 13230, while the sum is 32.

The square root of 133375217 is about 11548.8188573551. The cubic root of 133375217 is about 510.9264424102.

The spelling of 133375217 in words is "one hundred thirty-three million, three hundred seventy-five thousand, two hundred seventeen".