133221167 has 4 divisors (see below), whose sum is σ = 137518656. Its totient is φ = 128923680.

The previous prime is 133221149. The next prime is 133221169. The reversal of 133221167 is 761122331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 761122331 = 661 ⋅1151471.

It is a cyclic number.

It is not a de Polignac number, because 133221167 - 2¹⁴ = 133204783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133221169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2148698 + ... + 2148759.

It is an arithmetic number, because the mean of its divisors is an integer number (34379664).

Almost surely, 2^133221167 is an apocalyptic number.

133221167 is a deficient number, since it is larger than the sum of its proper divisors (4297489).

133221167 is an equidigital number, since it uses as much as digits as its factorization.

133221167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4297488.

The product of its digits is 1512, while the sum is 26.

The square root of 133221167 is about 11542.1474171837. The cubic root of 133221167 is about 510.7296578734.

Adding to 133221167 its reverse (761122331), we get a palindrome (894343498).

The spelling of 133221167 in words is "one hundred thirty-three million, two hundred twenty-one thousand, one hundred sixty-seven".