471138221 has 8 divisors (see below), whose sum is σ = 503430840. Its totient is φ = 439354368.

The previous prime is 471138169. The next prime is 471138223. The reversal of 471138221 is 122831174.

It can be written as a sum of positive squares in 4 ways, for example, as 124768900 + 346369321 = 11170^2 + 18611^2 .

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 471138221 - 2¹⁴ = 471121837 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 (471138223) 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, 125276 + ... + 128981.

It is an arithmetic number, because the mean of its divisors is an integer number (62928855).

Almost surely, 2^471138221 is an apocalyptic number.

It is an amenable number.

471138221 is a deficient number, since it is larger than the sum of its proper divisors (32292619).

471138221 is a wasteful number, since it uses less digits than its factorization.

471138221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254383.

The product of its digits is 2688, while the sum is 29.

The square root of 471138221 is about 21705.7186243626. The cubic root of 471138221 is about 778.1251381988.

Adding to 471138221 its reverse (122831174), we get a palindrome (593969395).

The spelling of 471138221 in words is "four hundred seventy-one million, one hundred thirty-eight thousand, two hundred twenty-one".