133443400217 has 2 divisors, whose sum is σ = 133443400218. Its totient is φ = 133443400216.

The previous prime is 133443400187. The next prime is 133443400231. The reversal of 133443400217 is 712004344331.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108465494281 + 24977905936 = 329341^2 + 158044^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133443400217 is a prime.

It is a super-2 number, since 2×133443400217² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (133443400297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66721700108 + 66721700109.

It is an arithmetic number, because the mean of its divisors is an integer number (66721700109).

Almost surely, 2^133443400217 is an apocalyptic number.

It is an amenable number.

133443400217 is a deficient number, since it is larger than the sum of its proper divisors (1).

133443400217 is an equidigital number, since it uses as much as digits as its factorization.

133443400217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 32.

Adding to 133443400217 its reverse (712004344331), we get a palindrome (845447744548).

The spelling of 133443400217 in words is "one hundred thirty-three billion, four hundred forty-three million, four hundred thousand, two hundred seventeen".