221640307704542 has 4 divisors (see below), whose sum is σ = 332460461556816. Its totient is φ = 110820153852270.

The previous prime is 221640307704521. The next prime is 221640307704601. The reversal of 221640307704542 is 245407703046122.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55410076926134 + ... + 55410076926137.

It is an arithmetic number, because the mean of its divisors is an integer number (83115115389204).

Almost surely, 2^{221640307704542} is an apocalyptic number.

221640307704542 is a deficient number, since it is larger than the sum of its proper divisors (110820153852274).

221640307704542 is a wasteful number, since it uses less digits than its factorization.

221640307704542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110820153852273.

The product of its (nonzero) digits is 2257920, while the sum is 47.

The spelling of 221640307704542 in words is "two hundred twenty-one trillion, six hundred forty billion, three hundred seven million, seven hundred four thousand, five hundred forty-two".