82134221 has 8 divisors (see below), whose sum is σ = 91305984. Its totient is φ = 73370160.

The previous prime is 82134197. The next prime is 82134229. The reversal of 82134221 is 12243128.

It is a happy number.

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 82134221 - 2¹⁰ = 82133197 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 (82134229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101501 + ... + 102306.

It is an arithmetic number, because the mean of its divisors is an integer number (11413248).

Almost surely, 2^82134221 is an apocalyptic number.

It is an amenable number.

82134221 is a deficient number, since it is larger than the sum of its proper divisors (9171763).

82134221 is a wasteful number, since it uses less digits than its factorization.

82134221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203851.

The product of its digits is 768, while the sum is 23.

The square root of 82134221 is about 9062.7932228425. The cubic root of 82134221 is about 434.6850602760.

Adding to 82134221 its reverse (12243128), we get a palindrome (94377349).

The spelling of 82134221 in words is "eighty-two million, one hundred thirty-four thousand, two hundred twenty-one".