225331261 has 4 divisors (see below), whose sum is σ = 225472572. Its totient is φ = 225189952.

The previous prime is 225331259. The next prime is 225331273. The reversal of 225331261 is 162133522.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 151044100 + 74287161 = 12290^2 + 8619^2 .

It is a cyclic number.

It is not a de Polignac number, because 225331261 - 2¹ = 225331259 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225331361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68236 + ... + 71461.

It is an arithmetic number, because the mean of its divisors is an integer number (56368143).

Almost surely, 2^225331261 is an apocalyptic number.

It is an amenable number.

225331261 is a deficient number, since it is larger than the sum of its proper divisors (141311).

225331261 is a wasteful number, since it uses less digits than its factorization.

225331261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141310.

The product of its digits is 2160, while the sum is 25.

The square root of 225331261 is about 15011.0379721057. The cubic root of 225331261 is about 608.5185415348.

Adding to 225331261 its reverse (162133522), we get a palindrome (387464783).

The spelling of 225331261 in words is "two hundred twenty-five million, three hundred thirty-one thousand, two hundred sixty-one".