225723443509 has 2 divisors, whose sum is σ = 225723443510. Its totient is φ = 225723443508.

The previous prime is 225723443471. The next prime is 225723443527. The reversal of 225723443509 is 905344327522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 218028294225 + 7695149284 = 466935^2 + 87722^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225723443509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225723453509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112861721754 + 112861721755.

It is an arithmetic number, because the mean of its divisors is an integer number (112861721755).

Almost surely, 2^225723443509 is an apocalyptic number.

It is an amenable number.

225723443509 is a deficient number, since it is larger than the sum of its proper divisors (1).

225723443509 is an equidigital number, since it uses as much as digits as its factorization.

225723443509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1814400, while the sum is 46.

The spelling of 225723443509 in words is "two hundred twenty-five billion, seven hundred twenty-three million, four hundred forty-three thousand, five hundred nine".