225720736309 has 2 divisors, whose sum is σ = 225720736310. Its totient is φ = 225720736308.

The previous prime is 225720736291. The next prime is 225720736327. The reversal of 225720736309 is 903637027522.

It is a balanced prime because it is at equal distance from previous prime (225720736291) and next prime (225720736327).

It can be written as a sum of positive squares in only one way, i.e., 158466094084 + 67254642225 = 398078^2 + 259335^2 .

It is a cyclic number.

It is not a de Polignac number, because 225720736309 - 2⁷ = 225720736181 is a prime.

It is a super-2 number, since 2×225720736309² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225720736609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112860368154 + 112860368155.

It is an arithmetic number, because the mean of its divisors is an integer number (112860368155).

Almost surely, 2^225720736309 is an apocalyptic number.

It is an amenable number.

225720736309 is a deficient number, since it is larger than the sum of its proper divisors (1).

225720736309 is an equidigital number, since it uses as much as digits as its factorization.

225720736309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 952560, while the sum is 46.

The spelling of 225720736309 in words is "two hundred twenty-five billion, seven hundred twenty million, seven hundred thirty-six thousand, three hundred nine".