225243331 has 8 divisors (see below), whose sum is σ = 230687600. Its totient is φ = 219927456.

The previous prime is 225243329. The next prime is 225243349. The reversal of 225243331 is 133342522.

It is not a de Polignac number, because 225243331 - 2¹ = 225243329 is a prime.

It is a super-2 number, since 2×225243331² = 101469116319951122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 225243296 and 225243305.

It is not an unprimeable number, because it can be changed into a prime (225243371) 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, 78091 + ... + 80923.

It is an arithmetic number, because the mean of its divisors is an integer number (28835950).

Almost surely, 2^225243331 is an apocalyptic number.

225243331 is a deficient number, since it is larger than the sum of its proper divisors (5444269).

225243331 is an frugal number, since it uses more digits than its factorization.

225243331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2962 (or 2876 counting only the distinct ones).

The product of its digits is 4320, while the sum is 25.

The square root of 225243331 is about 15008.1088415563. The cubic root of 225243331 is about 608.4393780896.

Adding to 225243331 its reverse (133342522), we get a palindrome (358585853).

The spelling of 225243331 in words is "two hundred twenty-five million, two hundred forty-three thousand, three hundred thirty-one".