221430624043 has 4 divisors (see below), whose sum is σ = 221434745688. Its totient is φ = 221426502400.

The previous prime is 221430623941. The next prime is 221430624047. The reversal of 221430624043 is 340426034122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221430624043 - 2²⁵ = 221397069611 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221430623996 and 221430624014.

It is not an unprimeable number, because it can be changed into a prime (221430624047) 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, 1979158 + ... + 2088043.

It is an arithmetic number, because the mean of its divisors is an integer number (55358686422).

Almost surely, 2^221430624043 is an apocalyptic number.

221430624043 is a deficient number, since it is larger than the sum of its proper divisors (4121645).

221430624043 is an equidigital number, since it uses as much as digits as its factorization.

221430624043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4121644.

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 221430624043 its reverse (340426034122), we get a palindrome (561856658165).

The spelling of 221430624043 in words is "two hundred twenty-one billion, four hundred thirty million, six hundred twenty-four thousand, forty-three".