133534217 has 2 divisors, whose sum is σ = 133534218. Its totient is φ = 133534216.

The previous prime is 133534213. The next prime is 133534229. The reversal of 133534217 is 712435331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76667536 + 56866681 = 8756^2 + 7541^2 .

It is a cyclic number.

It is not a de Polignac number, because 133534217 - 2² = 133534213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 133534217.

It is not a weakly prime, because it can be changed into another prime (133534213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66767108 + 66767109.

It is an arithmetic number, because the mean of its divisors is an integer number (66767109).

Almost surely, 2^133534217 is an apocalyptic number.

It is an amenable number.

133534217 is a deficient number, since it is larger than the sum of its proper divisors (1).

133534217 is an equidigital number, since it uses as much as digits as its factorization.

133534217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7560, while the sum is 29.

The square root of 133534217 is about 11555.7006278287. The cubic root of 133534217 is about 511.1293912684.

Adding to 133534217 its reverse (712435331), we get a palindrome (845969548).

The spelling of 133534217 in words is "one hundred thirty-three million, five hundred thirty-four thousand, two hundred seventeen".