221723202665450 has 48 divisors (see below), whose sum is σ = 439605763728000. Its totient is φ = 82957861808640.

The previous prime is 221723202665423. The next prime is 221723202665473. The reversal of 221723202665450 is 54566202327122.

It is a super-2 number, since 2×221723202665450² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221723202665395 and 221723202665404.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1477094855 + ... + 1477244954.

It is an arithmetic number, because the mean of its divisors is an integer number (9158453411000).

Almost surely, 2^{221723202665450} is an apocalyptic number.

221723202665450 is a deficient number, since it is larger than the sum of its proper divisors (217882561062550).

221723202665450 is a wasteful number, since it uses less digits than its factorization.

221723202665450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2954339919 (or 2954339914 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 47.

The spelling of 221723202665450 in words is "two hundred twenty-one trillion, seven hundred twenty-three billion, two hundred two million, six hundred sixty-five thousand, four hundred fifty".