221440430023 has 2 divisors, whose sum is σ = 221440430024. Its totient is φ = 221440430022.

The previous prime is 221440429979. The next prime is 221440430051. The reversal of 221440430023 is 320034044122.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221440430023 - 2¹³ = 221440421831 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221440430023.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221440430053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110720215011 + 110720215012.

It is an arithmetic number, because the mean of its divisors is an integer number (110720215012).

Almost surely, 2^221440430023 is an apocalyptic number.

221440430023 is a deficient number, since it is larger than the sum of its proper divisors (1).

221440430023 is an equidigital number, since it uses as much as digits as its factorization.

221440430023 is an evil number, because the sum of its binary digits is even.

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

Adding to 221440430023 its reverse (320034044122), we get a palindrome (541474474145).

The spelling of 221440430023 in words is "two hundred twenty-one billion, four hundred forty million, four hundred thirty thousand, twenty-three".