225487777 has 2 divisors, whose sum is σ = 225487778. Its totient is φ = 225487776.

The previous prime is 225487739. The next prime is 225487799. The reversal of 225487777 is 777784522.

225487777 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., 214358881 + 11128896 = 14641^2 + 3336^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225487777 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 225487777.

It is not a weakly prime, because it can be changed into another prime (225487277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112743888 + 112743889.

It is an arithmetic number, because the mean of its divisors is an integer number (112743889).

Almost surely, 2^225487777 is an apocalyptic number.

It is an amenable number.

225487777 is a deficient number, since it is larger than the sum of its proper divisors (1).

225487777 is an equidigital number, since it uses as much as digits as its factorization.

225487777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1536640, while the sum is 49.

The square root of 225487777 is about 15016.2504307833. The cubic root of 225487777 is about 608.6594020677.

The spelling of 225487777 in words is "two hundred twenty-five million, four hundred eighty-seven thousand, seven hundred seventy-seven".