221412510550766 has 8 divisors (see below), whose sum is σ = 332225248286880. Its totient is φ = 110670761121808.

The previous prime is 221412510550711. The next prime is 221412510550769. The reversal of 221412510550766 is 667055015214122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 221412510550766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221412510550769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17747068991 + ... + 17747081466.

It is an arithmetic number, because the mean of its divisors is an integer number (41528156035860).

Almost surely, 2^{221412510550766} is an apocalyptic number.

221412510550766 is a deficient number, since it is larger than the sum of its proper divisors (110812737736114).

221412510550766 is a wasteful number, since it uses less digits than its factorization.

221412510550766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35494153578.

The product of its (nonzero) digits is 1008000, while the sum is 47.

Adding to 221412510550766 its reverse (667055015214122), we get a palindrome (888467525764888).

The spelling of 221412510550766 in words is "two hundred twenty-one trillion, four hundred twelve billion, five hundred ten million, five hundred fifty thousand, seven hundred sixty-six".