71146221 has 8 divisors (see below), whose sum is σ = 94920960. Its totient is φ = 47401152.

The previous prime is 71146219. The next prime is 71146267. The reversal of 71146221 is 12264117.

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

It is not a de Polignac number, because 71146221 - 2¹ = 71146219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71146191 and 71146200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71146211) 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, 1036 + ... + 11973.

It is an arithmetic number, because the mean of its divisors is an integer number (11865120).

Almost surely, 2^71146221 is an apocalyptic number.

It is an amenable number.

71146221 is a deficient number, since it is larger than the sum of its proper divisors (23774739).

71146221 is a wasteful number, since it uses less digits than its factorization.

71146221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14835.

The product of its digits is 672, while the sum is 24.

The square root of 71146221 is about 8434.8219305448. The cubic root of 71146221 is about 414.3658403595.

The spelling of 71146221 in words is "seventy-one million, one hundred forty-six thousand, two hundred twenty-one".