221656434032382 has 8 divisors (see below), whose sum is σ = 443312868064776. Its totient is φ = 73885478010792.

The previous prime is 221656434032381. The next prime is 221656434032419. The reversal of 221656434032382 is 283230434656122.

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

221656434032382 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221656434032381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18471369502693 + ... + 18471369502704.

It is an arithmetic number, because the mean of its divisors is an integer number (55414108508097).

Almost surely, 2^{221656434032382} is an apocalyptic number.

221656434032382 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221656434032382 is a wasteful number, since it uses less digits than its factorization.

221656434032382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36942739005402.

The product of its (nonzero) digits is 9953280, while the sum is 51.

The spelling of 221656434032382 in words is "two hundred twenty-one trillion, six hundred fifty-six billion, four hundred thirty-four million, thirty-two thousand, three hundred eighty-two".