225213123 has 8 divisors (see below), whose sum is σ = 307608336. Its totient is φ = 146480000.

The previous prime is 225213119. The next prime is 225213167. The reversal of 225213123 is 321312522.

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 225213123 - 2² = 225213119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 225213123.

It is not an unprimeable number, because it can be changed into a prime (225213193) 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, 915378 + ... + 915623.

It is an arithmetic number, because the mean of its divisors is an integer number (38451042).

Almost surely, 2^225213123 is an apocalyptic number.

225213123 is a deficient number, since it is larger than the sum of its proper divisors (82395213).

225213123 is a wasteful number, since it uses less digits than its factorization.

225213123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1831045.

The product of its digits is 720, while the sum is 21.

The square root of 225213123 is about 15007.1024185217. The cubic root of 225213123 is about 608.4121770498.

Adding to 225213123 its reverse (321312522), we get a palindrome (546525645).

The spelling of 225213123 in words is "two hundred twenty-five million, two hundred thirteen thousand, one hundred twenty-three".