82121422 has 8 divisors (see below), whose sum is σ = 123224256. Its totient is φ = 41046672.

The previous prime is 82121419. The next prime is 82121453. The reversal of 82121422 is 22412128.

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

It is a junction number, because it is equal to n+sod(n) for n = 82121393 and 82121402.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3363 + ... + 13249.

It is an arithmetic number, because the mean of its divisors is an integer number (15403032).

Almost surely, 2^82121422 is an apocalyptic number.

82121422 is a deficient number, since it is larger than the sum of its proper divisors (41102834).

82121422 is a wasteful number, since it uses less digits than its factorization.

82121422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14042.

The product of its digits is 512, while the sum is 22.

The square root of 82121422 is about 9062.0870664544. The cubic root of 82121422 is about 434.6624800691.

The spelling of 82121422 in words is "eighty-two million, one hundred twenty-one thousand, four hundred twenty-two".