225121323 has 16 divisors (see below), whose sum is σ = 347386880. Its totient is φ = 127011456.

The previous prime is 225121321. The next prime is 225121331. The reversal of 225121323 is 323121522.

225121323 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 225121323 - 2¹ = 225121321 is a prime.

It is a super-2 number, since 2×225121323² = 101359220138540658, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 225121323.

It is not an unprimeable number, because it can be changed into a prime (225121321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66190 + ... + 69507.

It is an arithmetic number, because the mean of its divisors is an integer number (21711680).

Almost surely, 2^225121323 is an apocalyptic number.

225121323 is a deficient number, since it is larger than the sum of its proper divisors (122265557).

225121323 is a wasteful number, since it uses less digits than its factorization.

225121323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135786.

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

The square root of 225121323 is about 15004.0435549888. The cubic root of 225121323 is about 608.3295000613.

Adding to 225121323 its reverse (323121522), we get a palindrome (548242845).

The spelling of 225121323 in words is "two hundred twenty-five million, one hundred twenty-one thousand, three hundred twenty-three".