133455871 has 2 divisors, whose sum is σ = 133455872. Its totient is φ = 133455870.

The previous prime is 133455863. The next prime is 133455887. The reversal of 133455871 is 178554331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 133455871 - 2³ = 133455863 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 133455871.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133455811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66727935 + 66727936.

It is an arithmetic number, because the mean of its divisors is an integer number (66727936).

Almost surely, 2^133455871 is an apocalyptic number.

133455871 is a deficient number, since it is larger than the sum of its proper divisors (1).

133455871 is an equidigital number, since it uses as much as digits as its factorization.

133455871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50400, while the sum is 37.

The square root of 133455871 is about 11552.3102018601. The cubic root of 133455871 is about 511.0294099594.

The spelling of 133455871 in words is "one hundred thirty-three million, four hundred fifty-five thousand, eight hundred seventy-one".