221242200433 has 4 divisors (see below), whose sum is σ = 221243144688. Its totient is φ = 221241256180.

The previous prime is 221242200409. The next prime is 221242200449. The reversal of 221242200433 is 334002242122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 221242200433 - 2⁹ = 221242199921 is a prime.

It is a super-2 number, since 2×221242200433² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221242200398 and 221242200407.

It is not an unprimeable number, because it can be changed into a prime (221242200463) 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, 174918 + ... + 687808.

It is an arithmetic number, because the mean of its divisors is an integer number (55310786172).

Almost surely, 2^221242200433 is an apocalyptic number.

It is an amenable number.

221242200433 is a deficient number, since it is larger than the sum of its proper divisors (944255).

221242200433 is an equidigital number, since it uses as much as digits as its factorization.

221242200433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944254.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 221242200433 its reverse (334002242122), we get a palindrome (555244442555).

The spelling of 221242200433 in words is "two hundred twenty-one billion, two hundred forty-two million, two hundred thousand, four hundred thirty-three".