225204761 has 2 divisors, whose sum is σ = 225204762. Its totient is φ = 225204760.

The previous prime is 225204737. The next prime is 225204767. The reversal of 225204761 is 167402522.

It is a happy number.

225204761 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 224430361 + 774400 = 14981^2 + 880^2 .

It is a cyclic number.

It is not a de Polignac number, because 225204761 - 2¹⁸ = 224942617 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (225204767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112602380 + 112602381.

It is an arithmetic number, because the mean of its divisors is an integer number (112602381).

Almost surely, 2^225204761 is an apocalyptic number.

It is an amenable number.

225204761 is a deficient number, since it is larger than the sum of its proper divisors (1).

225204761 is an equidigital number, since it uses as much as digits as its factorization.

225204761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 225204761 is about 15006.8238145185. The cubic root of 225204761 is about 608.4046469889.

The spelling of 225204761 in words is "two hundred twenty-five million, two hundred four thousand, seven hundred sixty-one".