225242121 has 8 divisors (see below), whose sum is σ = 323424640. Its totient is φ = 138610512.

The previous prime is 225242107. The next prime is 225242153. The reversal of 225242121 is 121242522.

225242121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 225242121 - 2⁶ = 225242057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225242821) 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, 2887681 + ... + 2887758.

It is an arithmetic number, because the mean of its divisors is an integer number (40428080).

Almost surely, 2^225242121 is an apocalyptic number.

It is an amenable number.

225242121 is a deficient number, since it is larger than the sum of its proper divisors (98182519).

225242121 is a wasteful number, since it uses less digits than its factorization.

225242121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5775455.

The product of its digits is 640, while the sum is 21.

The square root of 225242121 is about 15008.0685299608. The cubic root of 225242121 is about 608.4382885820.

Adding to 225242121 its reverse (121242522), we get a palindrome (346484643).

The spelling of 225242121 in words is "two hundred twenty-five million, two hundred forty-two thousand, one hundred twenty-one".