221422115730247 has 4 divisors (see below), whose sum is σ = 223614413905896. Its totient is φ = 219229817554600.

The previous prime is 221422115730239. The next prime is 221422115730259. The reversal of 221422115730247 is 742037511224122.

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

It is a cyclic number.

It is not a de Polignac number, because 221422115730247 - 2³ = 221422115730239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221422115730287) 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, 1096149087673 + ... + 1096149087874.

It is an arithmetic number, because the mean of its divisors is an integer number (55903603476474).

Almost surely, 2^{221422115730247} is an apocalyptic number.

221422115730247 is a deficient number, since it is larger than the sum of its proper divisors (2192298175649).

221422115730247 is a wasteful number, since it uses less digits than its factorization.

221422115730247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2192298175648.

The product of its (nonzero) digits is 376320, while the sum is 43.

Adding to 221422115730247 its reverse (742037511224122), we get a palindrome (963459626954369).

The spelling of 221422115730247 in words is "two hundred twenty-one trillion, four hundred twenty-two billion, one hundred fifteen million, seven hundred thirty thousand, two hundred forty-seven".