221656362032444 has 12 divisors (see below), whose sum is σ = 393688165401384. Its totient is φ = 109174029060624.

The previous prime is 221656362032429. The next prime is 221656362032467. The reversal of 221656362032444 is 444230263656122.

It is a super-2 number, since 2×221656362032444² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221656362032392 and 221656362032401.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 413537988599 + ... + 413537989134.

It is an arithmetic number, because the mean of its divisors is an integer number (32807347116782).

Almost surely, 2^{221656362032444} is an apocalyptic number.

It is an amenable number.

221656362032444 is a deficient number, since it is larger than the sum of its proper divisors (172031803368940).

221656362032444 is a wasteful number, since it uses less digits than its factorization.

221656362032444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827075977804 (or 827075977802 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 50.

The spelling of 221656362032444 in words is "two hundred twenty-one trillion, six hundred fifty-six billion, three hundred sixty-two million, thirty-two thousand, four hundred forty-four".