133522391 has 2 divisors, whose sum is σ = 133522392. Its totient is φ = 133522390.

The previous prime is 133522309. The next prime is 133522399. The reversal of 133522391 is 193225331.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133522391 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133522399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66761195 + 66761196.

It is an arithmetic number, because the mean of its divisors is an integer number (66761196).

Almost surely, 2^133522391 is an apocalyptic number.

133522391 is a deficient number, since it is larger than the sum of its proper divisors (1).

133522391 is an equidigital number, since it uses as much as digits as its factorization.

133522391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4860, while the sum is 29.

The square root of 133522391 is about 11555.1889210000. The cubic root of 133522391 is about 511.1143020157.

The spelling of 133522391 in words is "one hundred thirty-three million, five hundred twenty-two thousand, three hundred ninety-one".