225506121 has 16 divisors (see below), whose sum is σ = 315015168. Its totient is φ = 143312400.

The previous prime is 225506119. The next prime is 225506131. The reversal of 225506121 is 121605522.

It is a happy number.

It is not a de Polignac number, because 225506121 - 2¹ = 225506119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 225506091 and 225506100.

It is not an unprimeable number, because it can be changed into a prime (225506111) 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, 11865 + ... + 24326.

It is an arithmetic number, because the mean of its divisors is an integer number (19688448).

Almost surely, 2^225506121 is an apocalyptic number.

It is an amenable number.

225506121 is a deficient number, since it is larger than the sum of its proper divisors (89509047).

225506121 is a wasteful number, since it uses less digits than its factorization.

225506121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36292.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 225506121 is about 15016.8612233050. The cubic root of 225506121 is about 608.6759069465.

The spelling of 225506121 in words is "two hundred twenty-five million, five hundred six thousand, one hundred twenty-one".