225142355321 has 4 divisors (see below), whose sum is σ = 242460998052. Its totient is φ = 207823712592.

The previous prime is 225142355309. The next prime is 225142355323. The reversal of 225142355321 is 123553241522.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 62460006400 + 162682348921 = 249920^2 + 403339^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225142355321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (225142355323) 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, 8659321346 + ... + 8659321371.

It is an arithmetic number, because the mean of its divisors is an integer number (60615249513).

Almost surely, 2^225142355321 is an apocalyptic number.

It is an amenable number.

225142355321 is a deficient number, since it is larger than the sum of its proper divisors (17318642731).

225142355321 is a wasteful number, since it uses less digits than its factorization.

225142355321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17318642730.

The product of its digits is 72000, while the sum is 35.

Adding to 225142355321 its reverse (123553241522), we get a palindrome (348695596843).

The spelling of 225142355321 in words is "two hundred twenty-five billion, one hundred forty-two million, three hundred fifty-five thousand, three hundred twenty-one".