221445043503 has 8 divisors (see below), whose sum is σ = 295573834416. Its totient is φ = 147473140800.

The previous prime is 221445043489. The next prime is 221445043513. The reversal of 221445043503 is 305340544122.

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

It is not a de Polignac number, because 221445043503 - 2¹³ = 221445035311 is a prime.

It is a super-2 number, since 2×221445043503² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221445043513) 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, 39218758 + ... + 39224403.

It is an arithmetic number, because the mean of its divisors is an integer number (36946729302).

Almost surely, 2^221445043503 is an apocalyptic number.

221445043503 is a deficient number, since it is larger than the sum of its proper divisors (74128790913).

221445043503 is an equidigital number, since it uses as much as digits as its factorization.

221445043503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78444105.

The product of its (nonzero) digits is 57600, while the sum is 33.

Adding to 221445043503 its reverse (305340544122), we get a palindrome (526785587625).

The spelling of 221445043503 in words is "two hundred twenty-one billion, four hundred forty-five million, forty-three thousand, five hundred three".