223440353453 has 4 divisors (see below), whose sum is σ = 224003175900. Its totient is φ = 222877531008.

The previous prime is 223440353377. The next prime is 223440353491. The reversal of 223440353453 is 354353044322.

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

It can be written as a sum of positive squares in 2 ways, for example, as 192548072809 + 30892280644 = 438803^2 + 175762^2 .

It is a cyclic number.

It is not a de Polignac number, because 223440353453 - 2³² = 219145386157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223440353053) 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, 281410628 + ... + 281411421.

It is an arithmetic number, because the mean of its divisors is an integer number (56000793975).

Almost surely, 2^223440353453 is an apocalyptic number.

It is an amenable number.

223440353453 is a deficient number, since it is larger than the sum of its proper divisors (562822447).

223440353453 is an equidigital number, since it uses as much as digits as its factorization.

223440353453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562822446.

The product of its (nonzero) digits is 518400, while the sum is 38.

Adding to 223440353453 its reverse (354353044322), we get a palindrome (577793397775).

The spelling of 223440353453 in words is "two hundred twenty-three billion, four hundred forty million, three hundred fifty-three thousand, four hundred fifty-three".