221342041445 has 16 divisors (see below), whose sum is σ = 321410965248. Its totient is φ = 142849317120.

The previous prime is 221342041441. The next prime is 221342041463. The reversal of 221342041445 is 544140243122.

It is not a de Polignac number, because 221342041445 - 2² = 221342041441 is a prime.

It is a super-2 number, since 2×221342041445² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221342041441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 186001121 + ... + 186002310.

It is an arithmetic number, because the mean of its divisors is an integer number (20088185328).

Almost surely, 2^221342041445 is an apocalyptic number.

It is an amenable number.

221342041445 is a deficient number, since it is larger than the sum of its proper divisors (100068923803).

221342041445 is a wasteful number, since it uses less digits than its factorization.

221342041445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372003460.

The product of its (nonzero) digits is 30720, while the sum is 32.

Adding to 221342041445 its reverse (544140243122), we get a palindrome (765482284567).

The spelling of 221342041445 in words is "two hundred twenty-one billion, three hundred forty-two million, forty-one thousand, four hundred forty-five".