133131571 has 2 divisors, whose sum is σ = 133131572. Its totient is φ = 133131570.

The previous prime is 133131563. The next prime is 133131637. The reversal of 133131571 is 175131331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 133131571 - 2³ = 133131563 is a prime.

It is not a weakly prime, because it can be changed into another prime (133131541) 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, 66565785 + 66565786.

It is an arithmetic number, because the mean of its divisors is an integer number (66565786).

Almost surely, 2^133131571 is an apocalyptic number.

133131571 is a deficient number, since it is larger than the sum of its proper divisors (1).

133131571 is an equidigital number, since it uses as much as digits as its factorization.

133131571 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 945, while the sum is 25.

The square root of 133131571 is about 11538.2655108989. The cubic root of 133131571 is about 510.6151375421.

It can be divided in two parts, 13313 and 1571, that added together give a square (14884 = 122²).

The spelling of 133131571 in words is "one hundred thirty-three million, one hundred thirty-one thousand, five hundred seventy-one".