71853221 has 8 divisors (see below), whose sum is σ = 78465888. Its totient is φ = 65254000.

The previous prime is 71853179. The next prime is 71853227. The reversal of 71853221 is 12235817.

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 71853221 - 2⁶ = 71853157 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 (71853227) 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, 10226 + ... + 15756.

It is an arithmetic number, because the mean of its divisors is an integer number (9808236).

Almost surely, 2^71853221 is an apocalyptic number.

It is an amenable number.

71853221 is a deficient number, since it is larger than the sum of its proper divisors (6612667).

71853221 is a wasteful number, since it uses less digits than its factorization.

71853221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6723.

The product of its digits is 3360, while the sum is 29.

The square root of 71853221 is about 8476.6279262452. The cubic root of 71853221 is about 415.7338754173.

The spelling of 71853221 in words is "seventy-one million, eight hundred fifty-three thousand, two hundred twenty-one".