221416364631450 has 48 divisors (see below), whose sum is σ = 549241455288096. Its totient is φ = 59030506804800.

The previous prime is 221416364631443. The next prime is 221416364631491. The reversal of 221416364631450 is 54136463614122.

It is a self number, because there is not a number n which added to its sum of digits gives 221416364631450.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 172572432 + ... + 173850731.

It is an arithmetic number, because the mean of its divisors is an integer number (11442530318502).

Almost surely, 2^{221416364631450} is an apocalyptic number.

221416364631450 is an abundant number, since it is smaller than the sum of its proper divisors (327825090656646).

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

221416364631450 is a wasteful number, since it uses less digits than its factorization.

221416364631450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346427439 (or 346427434 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 48.

The spelling of 221416364631450 in words is "two hundred twenty-one trillion, four hundred sixteen billion, three hundred sixty-four million, six hundred thirty-one thousand, four hundred fifty".