133500166522251 has 4 divisors (see below), whose sum is σ = 178000222029672. Its totient is φ = 89000111014832.

The previous prime is 133500166522199. The next prime is 133500166522277. The reversal of 133500166522251 is 152225661005331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 133500166522251 - 2¹⁹ = 133500165997963 is a prime.

It is a super-2 number, since 2×133500166522251² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (133500166522451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22250027753706 + ... + 22250027753711.

It is an arithmetic number, because the mean of its divisors is an integer number (44500055507418).

Almost surely, 2^{133500166522251} is an apocalyptic number.

133500166522251 is a deficient number, since it is larger than the sum of its proper divisors (44500055507421).

133500166522251 is an equidigital number, since it uses as much as digits as its factorization.

133500166522251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44500055507420.

The product of its (nonzero) digits is 324000, while the sum is 42.

The spelling of 133500166522251 in words is "one hundred thirty-three trillion, five hundred billion, one hundred sixty-six million, five hundred twenty-two thousand, two hundred fifty-one".