133213471 has 2 divisors, whose sum is σ = 133213472. Its totient is φ = 133213470.

The previous prime is 133213397. The next prime is 133213489. The reversal of 133213471 is 174312331.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133213471 is a prime.

It is a super-3 number, since 3×133213471³ (a number of 25 digits) contains 333 as substring.

It is equal to p_7550026 and since 133213471 and 7550026 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133213271) 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 as a sum of consecutive naturals, namely, 66606735 + 66606736.

It is an arithmetic number, because the mean of its divisors is an integer number (66606736).

Almost surely, 2^133213471 is an apocalyptic number.

133213471 is a deficient number, since it is larger than the sum of its proper divisors (1).

133213471 is an equidigital number, since it uses as much as digits as its factorization.

133213471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 25.

The square root of 133213471 is about 11541.8140255334. The cubic root of 133213471 is about 510.7198229719.

The spelling of 133213471 in words is "one hundred thirty-three million, two hundred thirteen thousand, four hundred seventy-one".