225520355 has 16 divisors (see below), whose sum is σ = 275827584. Its totient is φ = 176964480.

The previous prime is 225520349. The next prime is 225520363. The reversal of 225520355 is 553025522.

It is not a de Polignac number, because 225520355 - 2¹⁶ = 225454819 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140417 + ... + 142013.

It is an arithmetic number, because the mean of its divisors is an integer number (17239224).

Almost surely, 2^225520355 is an apocalyptic number.

225520355 is a deficient number, since it is larger than the sum of its proper divisors (50307229).

225520355 is a wasteful number, since it uses less digits than its factorization.

225520355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2126.

The product of its (nonzero) digits is 15000, while the sum is 29.

The square root of 225520355 is about 15017.3351497528. The cubic root of 225520355 is about 608.6887132664.

Adding to 225520355 its reverse (553025522), we get a palindrome (778545877).

The spelling of 225520355 in words is "two hundred twenty-five million, five hundred twenty thousand, three hundred fifty-five".