71833221 has 12 divisors (see below), whose sum is σ = 103834848. Its totient is φ = 47853864.

The previous prime is 71833219. The next prime is 71833247. The reversal of 71833221 is 12233817.

It is not a de Polignac number, because 71833221 - 2¹ = 71833219 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71833121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18016 + ... + 21638.

It is an arithmetic number, because the mean of its divisors is an integer number (8652904).

Almost surely, 2^71833221 is an apocalyptic number.

It is an amenable number.

71833221 is a deficient number, since it is larger than the sum of its proper divisors (32001627).

71833221 is a wasteful number, since it uses less digits than its factorization.

71833221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5832 (or 5829 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 71833221 is about 8475.4481297451. The cubic root of 71833221 is about 415.6952993267.

It can be divided in two parts, 7183 and 3221, that added together give a square (10404 = 102²).

The spelling of 71833221 in words is "seventy-one million, eight hundred thirty-three thousand, two hundred twenty-one".