225231521252 has 12 divisors (see below), whose sum is σ = 396800499900. Its totient is φ = 111859949856.

The previous prime is 225231521213. The next prime is 225231521261. The reversal of 225231521252 is 252125132522.

It can be written as a sum of positive squares in 2 ways, for example, as 12023999716 + 213207521536 = 109654^2 + 461744^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188952023 + ... + 188953214.

It is an arithmetic number, because the mean of its divisors is an integer number (33066708325).

Almost surely, 2^225231521252 is an apocalyptic number.

It is an amenable number.

225231521252 is a deficient number, since it is larger than the sum of its proper divisors (171568978648).

225231521252 is a wasteful number, since it uses less digits than its factorization.

225231521252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377905390 (or 377905388 counting only the distinct ones).

The product of its digits is 24000, while the sum is 32.

Adding to 225231521252 its reverse (252125132522), we get a palindrome (477356653774).

The spelling of 225231521252 in words is "two hundred twenty-five billion, two hundred thirty-one million, five hundred twenty-one thousand, two hundred fifty-two".