225333781 has 2 divisors, whose sum is σ = 225333782. Its totient is φ = 225333780.

The previous prime is 225333769. The next prime is 225333809. The reversal of 225333781 is 187333522.

225333781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 207100881 + 18232900 = 14391^2 + 4270^2 .

It is a cyclic number.

It is not a de Polignac number, because 225333781 - 2¹³ = 225325589 is a prime.

It is a super-2 number, since 2×225333781² = 101550625719511922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225333721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112666890 + 112666891.

It is an arithmetic number, because the mean of its divisors is an integer number (112666891).

Almost surely, 2^225333781 is an apocalyptic number.

It is an amenable number.

225333781 is a deficient number, since it is larger than the sum of its proper divisors (1).

225333781 is an equidigital number, since it uses as much as digits as its factorization.

225333781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 34.

The square root of 225333781 is about 15011.1219101039. The cubic root of 225333781 is about 608.5208099891.

The spelling of 225333781 in words is "two hundred twenty-five million, three hundred thirty-three thousand, seven hundred eighty-one".