71621133 has 8 divisors (see below), whose sum is σ = 95923968. Its totient is φ = 47532864.

The previous prime is 71621131. The next prime is 71621141. The reversal of 71621133 is 33112617.

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

It is not a de Polignac number, because 71621133 - 2¹ = 71621131 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71621131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52860 + ... + 54197.

It is an arithmetic number, because the mean of its divisors is an integer number (11990496).

Almost surely, 2^71621133 is an apocalyptic number.

It is an amenable number.

71621133 is a deficient number, since it is larger than the sum of its proper divisors (24302835).

71621133 is a wasteful number, since it uses less digits than its factorization.

71621133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107283.

The product of its digits is 756, while the sum is 24.

The square root of 71621133 is about 8462.9269759345. The cubic root of 71621133 is about 415.2857817700.

The spelling of 71621133 in words is "seventy-one million, six hundred twenty-one thousand, one hundred thirty-three".