71952221 has 8 divisors (see below), whose sum is σ = 82624800. Its totient is φ = 61968240.

The previous prime is 71952203. The next prime is 71952227. The reversal of 71952221 is 12225917.

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

It is a cyclic number.

It is not a de Polignac number, because 71952221 - 2¹⁴ = 71935837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71952227) 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, 171926 + ... + 172343.

It is an arithmetic number, because the mean of its divisors is an integer number (10328100).

Almost surely, 2^71952221 is an apocalyptic number.

It is an amenable number.

71952221 is a deficient number, since it is larger than the sum of its proper divisors (10672579).

71952221 is a wasteful number, since it uses less digits than its factorization.

71952221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344299.

The product of its digits is 2520, while the sum is 29.

The square root of 71952221 is about 8482.4655024350. The cubic root of 71952221 is about 415.9247217244.

The spelling of 71952221 in words is "seventy-one million, nine hundred fifty-two thousand, two hundred twenty-one".