225205775 has 6 divisors (see below), whose sum is σ = 279255192. Its totient is φ = 180164600.

The previous prime is 225205769. The next prime is 225205777. The reversal of 225205775 is 577502522.

It is a de Polignac number, because none of the positive numbers 2^k-225205775 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225205777) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4504091 + ... + 4504140.

It is an arithmetic number, because the mean of its divisors is an integer number (46542532).

Almost surely, 2^225205775 is an apocalyptic number.

225205775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

225205775 is a deficient number, since it is larger than the sum of its proper divisors (54049417).

225205775 is an equidigital number, since it uses as much as digits as its factorization.

225205775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9008241 (or 9008236 counting only the distinct ones).

The product of its (nonzero) digits is 49000, while the sum is 35.

The square root of 225205775 is about 15006.8575991111. The cubic root of 225205775 is about 608.4055601155.

The spelling of 225205775 in words is "two hundred twenty-five million, two hundred five thousand, seven hundred seventy-five".