82213471 has 4 divisors (see below), whose sum is σ = 82244232. Its totient is φ = 82182712.

The previous prime is 82213433. The next prime is 82213493. The reversal of 82213471 is 17431228.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 82213471 - 2¹⁹ = 81689183 is a prime.

It is a super-3 number, since 3×82213471³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82213871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10945 + ... + 16858.

It is an arithmetic number, because the mean of its divisors is an integer number (20561058).

Almost surely, 2^82213471 is an apocalyptic number.

82213471 is a deficient number, since it is larger than the sum of its proper divisors (30761).

82213471 is a wasteful number, since it uses less digits than its factorization.

82213471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30760.

The product of its digits is 2688, while the sum is 28.

The square root of 82213471 is about 9067.1644409926. The cubic root of 82213471 is about 434.8248222284.

Adding to 82213471 its reverse (17431228), we get a palindrome (99644699).

The spelling of 82213471 in words is "eighty-two million, two hundred thirteen thousand, four hundred seventy-one".