221450440243503 has 8 divisors (see below), whose sum is σ = 302133933975808. Its totient is φ = 144200286670104.

The previous prime is 221450440243451. The next prime is 221450440243519. The reversal of 221450440243503 is 305342044054122.

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

It is not a de Polignac number, because 221450440243503 - 2⁸ = 221450440243247 is a prime.

It is a super-2 number, since 2×221450440243503² (a number of 29 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 (221450440242503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 858335039575 + ... + 858335039832.

It is an arithmetic number, because the mean of its divisors is an integer number (37766741746976).

Almost surely, 2^{221450440243503} is an apocalyptic number.

221450440243503 is a deficient number, since it is larger than the sum of its proper divisors (80683493732305).

221450440243503 is a wasteful number, since it uses less digits than its factorization.

221450440243503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1716670079453.

The product of its (nonzero) digits is 460800, while the sum is 39.

Adding to 221450440243503 its reverse (305342044054122), we get a palindrome (526792484297625).

The spelling of 221450440243503 in words is "two hundred twenty-one trillion, four hundred fifty billion, four hundred forty million, two hundred forty-three thousand, five hundred three".