225397777 has 4 divisors (see below), whose sum is σ = 245888496. Its totient is φ = 204907060.

The previous prime is 225397771. The next prime is 225397819. The reversal of 225397777 is 777793522.

It is a happy number.

225397777 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 225397777 - 2¹⁹ = 224873489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 225397777.

It is not an unprimeable number, because it can be changed into a prime (225397771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10245343 + ... + 10245364.

It is an arithmetic number, because the mean of its divisors is an integer number (61472124).

Almost surely, 2^225397777 is an apocalyptic number.

It is an amenable number.

225397777 is a deficient number, since it is larger than the sum of its proper divisors (20490719).

225397777 is a wasteful number, since it uses less digits than its factorization.

225397777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20490718.

The product of its digits is 1296540, while the sum is 49.

The square root of 225397777 is about 15013.2533782655. The cubic root of 225397777 is about 608.5784122588.

The spelling of 225397777 in words is "two hundred twenty-five million, three hundred ninety-seven thousand, seven hundred seventy-seven".