221640307430654 has 32 divisors (see below), whose sum is σ = 381978507545856. Its totient is φ = 94483619202240.

The previous prime is 221640307430639. The next prime is 221640307430923. The reversal of 221640307430654 is 456034703046122.

It is a junction number, because it is equal to n+sod(n) for n = 221640307430599 and 221640307430608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31820312 + ... + 38155115.

It is an arithmetic number, because the mean of its divisors is an integer number (11936828360808).

Almost surely, 2^{221640307430654} is an apocalyptic number.

221640307430654 is a deficient number, since it is larger than the sum of its proper divisors (160338200115202).

221640307430654 is a wasteful number, since it uses less digits than its factorization.

221640307430654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69976640.

The product of its (nonzero) digits is 2903040, while the sum is 47.

The spelling of 221640307430654 in words is "two hundred twenty-one trillion, six hundred forty billion, three hundred seven million, four hundred thirty thousand, six hundred fifty-four".