221442520243 has 24 divisors (see below), whose sum is σ = 260360107488. Its totient is φ = 187775191296.

The previous prime is 221442520207. The next prime is 221442520289. The reversal of 221442520243 is 342025244122.

It is a happy number.

It is not a de Polignac number, because 221442520243 - 2¹³ = 221442512051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221442520543) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5090955 + ... + 5134267.

It is an arithmetic number, because the mean of its divisors is an integer number (10848337812).

Almost surely, 2^221442520243 is an apocalyptic number.

221442520243 is a deficient number, since it is larger than the sum of its proper divisors (38917587245).

221442520243 is a wasteful number, since it uses less digits than its factorization.

221442520243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44443 (or 44436 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 31.

Adding to 221442520243 its reverse (342025244122), we get a palindrome (563467764365).

The spelling of 221442520243 in words is "two hundred twenty-one billion, four hundred forty-two million, five hundred twenty thousand, two hundred forty-three".