225423052221 has 4 divisors (see below), whose sum is σ = 300564069632. Its totient is φ = 150282034812.

The previous prime is 225423052219. The next prime is 225423052223. The reversal of 225423052221 is 122250324522.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (225423052219) and next prime (225423052223).

It is not a de Polignac number, because 225423052221 - 2¹ = 225423052219 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 (225423052223) 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, 37570508701 + ... + 37570508706.

It is an arithmetic number, because the mean of its divisors is an integer number (75141017408).

Almost surely, 2^225423052221 is an apocalyptic number.

It is an amenable number.

225423052221 is a deficient number, since it is larger than the sum of its proper divisors (75141017411).

225423052221 is an equidigital number, since it uses as much as digits as its factorization.

225423052221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75141017410.

The product of its (nonzero) digits is 19200, while the sum is 30.

Adding to 225423052221 its reverse (122250324522), we get a palindrome (347673376743).

The spelling of 225423052221 in words is "two hundred twenty-five billion, four hundred twenty-three million, fifty-two thousand, two hundred twenty-one".