221420522154616 has 32 divisors (see below), whose sum is σ = 424827086428800. Its totient is φ = 108133403868000.

The previous prime is 221420522154589. The next prime is 221420522154647. The reversal of 221420522154616 is 616451225024122.

221420522154616 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10449741 + ... + 23495491.

It is an arithmetic number, because the mean of its divisors is an integer number (13275846450900).

Almost surely, 2^{221420522154616} is an apocalyptic number.

It is an amenable number.

221420522154616 is a deficient number, since it is larger than the sum of its proper divisors (203406564274184).

221420522154616 is a wasteful number, since it uses less digits than its factorization.

221420522154616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13095139 (or 13095135 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 43.

Adding to 221420522154616 its reverse (616451225024122), we get a palindrome (837871747178738).

The spelling of 221420522154616 in words is "two hundred twenty-one trillion, four hundred twenty billion, five hundred twenty-two million, one hundred fifty-four thousand, six hundred sixteen".