221324000245 has 4 divisors (see below), whose sum is σ = 265588800300. Its totient is φ = 177059200192.

The previous prime is 221324000243. The next prime is 221324000273. The reversal of 221324000245 is 542000423122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 542000423122 = 2 ⋅271000211561.

It can be written as a sum of positive squares in 2 ways, for example, as 28794356721 + 192529643524 = 169689^2 + 438782^2 .

It is a cyclic number.

It is not a de Polignac number, because 221324000245 - 2¹ = 221324000243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221324000243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22132400020 + ... + 22132400029.

It is an arithmetic number, because the mean of its divisors is an integer number (66397200075).

Almost surely, 2^221324000245 is an apocalyptic number.

It is an amenable number.

221324000245 is a deficient number, since it is larger than the sum of its proper divisors (44264800055).

221324000245 is an equidigital number, since it uses as much as digits as its factorization.

221324000245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44264800054.

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 221324000245 its reverse (542000423122), we get a palindrome (763324423367).

The spelling of 221324000245 in words is "two hundred twenty-one billion, three hundred twenty-four million, two hundred forty-five", and thus it is an aban number.