225377729 has 2 divisors, whose sum is σ = 225377730. Its totient is φ = 225377728.

The previous prime is 225377683. The next prime is 225377813. The reversal of 225377729 is 927773522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 217621504 + 7756225 = 14752^2 + 2785^2 .

It is a cyclic number.

It is not a de Polignac number, because 225377729 - 2¹² = 225373633 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 225377729.

It is not a weakly prime, because it can be changed into another prime (225377129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112688864 + 112688865.

It is an arithmetic number, because the mean of its divisors is an integer number (112688865).

Almost surely, 2^225377729 is an apocalyptic number.

It is an amenable number.

225377729 is a deficient number, since it is larger than the sum of its proper divisors (1).

225377729 is an equidigital number, since it uses as much as digits as its factorization.

225377729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 370440, while the sum is 44.

The square root of 225377729 is about 15012.5856866830. The cubic root of 225377729 is about 608.5603683929.

The spelling of 225377729 in words is "two hundred twenty-five million, three hundred seventy-seven thousand, seven hundred twenty-nine".