224565161565421 has 32 divisors (see below), whose sum is σ = 238199026320000. Its totient is φ = 211706824957056.

The previous prime is 224565161565391. The next prime is 224565161565461. The reversal of 224565161565421 is 124565161565422.

It is not a de Polignac number, because 224565161565421 - 2²³ = 224565153176813 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 (224565161565461) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1584845145 + ... + 1584986833.

It is an arithmetic number, because the mean of its divisors is an integer number (7443719572500).

Almost surely, 2^{224565161565421} is an apocalyptic number.

It is an amenable number.

224565161565421 is a deficient number, since it is larger than the sum of its proper divisors (13633864754579).

224565161565421 is an equidigital number, since it uses as much as digits as its factorization.

224565161565421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142874 (or 142836 counting only the distinct ones).

The product of its digits is 17280000, while the sum is 55.

Subtracting from 224565161565421 its reverse (124565161565422), we obtain a palindrome (99999999999999).

The spelling of 224565161565421 in words is "two hundred twenty-four trillion, five hundred sixty-five billion, one hundred sixty-one million, five hundred sixty-five thousand, four hundred twenty-one".