225342440021 has 8 divisors (see below), whose sum is σ = 229674585600. Its totient is φ = 221030875440.

The previous prime is 225342439979. The next prime is 225342440053. The reversal of 225342440021 is 120044243522.

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 225342440021 - 2⁶ = 225342439957 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 (225342443021) 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, 5123141 + ... + 5166938.

It is an arithmetic number, because the mean of its divisors is an integer number (28709323200).

Almost surely, 2^225342440021 is an apocalyptic number.

It is an amenable number.

225342440021 is a deficient number, since it is larger than the sum of its proper divisors (4332145579).

225342440021 is a wasteful number, since it uses less digits than its factorization.

225342440021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10290499.

The product of its (nonzero) digits is 15360, while the sum is 29.

Adding to 225342440021 its reverse (120044243522), we get a palindrome (345386683543).

The spelling of 225342440021 in words is "two hundred twenty-five billion, three hundred forty-two million, four hundred forty thousand, twenty-one".