225253435021 has 8 divisors (see below), whose sum is σ = 227060134200. Its totient is φ = 223452536832.

The previous prime is 225253434997. The next prime is 225253435067. The reversal of 225253435021 is 120534352522.

It can be written as a sum of positive squares in 4 ways, for example, as 133513506025 + 91739928996 = 365395^2 + 302886^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 225253435021 - 2¹³ = 225253426829 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 (225253435091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1372260 + ... + 1527613.

It is an arithmetic number, because the mean of its divisors is an integer number (28382516775).

Almost surely, 2^225253435021 is an apocalyptic number.

It is an amenable number.

225253435021 is a deficient number, since it is larger than the sum of its proper divisors (1806699179).

225253435021 is a wasteful number, since it uses less digits than its factorization.

225253435021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2900495.

The product of its (nonzero) digits is 72000, while the sum is 34.

Adding to 225253435021 its reverse (120534352522), we get a palindrome (345787787543).

The spelling of 225253435021 in words is "two hundred twenty-five billion, two hundred fifty-three million, four hundred thirty-five thousand, twenty-one".