71081133 has 8 divisors (see below), whose sum is σ = 94828608. Its totient is φ = 47360544.

The previous prime is 71081123. The next prime is 71081137. The reversal of 71081133 is 33118017.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 71081133 - 2²⁴ = 54303917 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71081137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 585 + ... + 11937.

It is an arithmetic number, because the mean of its divisors is an integer number (11853576).

Almost surely, 2^71081133 is an apocalyptic number.

It is an amenable number.

71081133 is a deficient number, since it is larger than the sum of its proper divisors (23747475).

71081133 is a wasteful number, since it uses less digits than its factorization.

71081133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13443.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 71081133 is about 8430.9627564116. The cubic root of 71081133 is about 414.2394411768.

The spelling of 71081133 in words is "seventy-one million, eighty-one thousand, one hundred thirty-three".