133645172122237 has 2 divisors, whose sum is σ = 133645172122238. Its totient is φ = 133645172122236.

The previous prime is 133645172122211. The next prime is 133645172122243. The reversal of 133645172122237 is 732221271546331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119272740494436 + 14372431627801 = 10921206^2 + 3791099^2 .

It is a cyclic number.

It is not a de Polignac number, because 133645172122237 - 2¹⁵ = 133645172089469 is a prime.

It is a super-2 number, since 2×133645172122237² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133645172122537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66822586061118 + 66822586061119.

It is an arithmetic number, because the mean of its divisors is an integer number (66822586061119).

Almost surely, 2^{133645172122237} is an apocalyptic number.

It is an amenable number.

133645172122237 is a deficient number, since it is larger than the sum of its proper divisors (1).

133645172122237 is an equidigital number, since it uses as much as digits as its factorization.

133645172122237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2540160, while the sum is 49.

The spelling of 133645172122237 in words is "one hundred thirty-three trillion, six hundred forty-five billion, one hundred seventy-two million, one hundred twenty-two thousand, two hundred thirty-seven".