221430552644444 has 144 divisors (see below), whose sum is σ = 463865565953664. Its totient is φ = 91669610822400.

The previous prime is 221430552644387. The next prime is 221430552644459. The reversal of 221430552644444 is 444446255034122.

It is a junction number, because it is equal to n+sod(n) for n = 221430552644392 and 221430552644401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 476854259 + ... + 477318389.

It is an arithmetic number, because the mean of its divisors is an integer number (3221288652456).

Almost surely, 2^{221430552644444} is an apocalyptic number.

It is an amenable number.

221430552644444 is an abundant number, since it is smaller than the sum of its proper divisors (242435013309220).

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

221430552644444 is a wasteful number, since it uses less digits than its factorization.

221430552644444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465028 (or 465013 counting only the distinct ones).

The product of its (nonzero) digits is 14745600, while the sum is 50.

The spelling of 221430552644444 in words is "two hundred twenty-one trillion, four hundred thirty billion, five hundred fifty-two million, six hundred forty-four thousand, four hundred forty-four".