225787789 has 8 divisors (see below), whose sum is σ = 229588128. Its totient is φ = 222000240.

The previous prime is 225787777. The next prime is 225787873. The reversal of 225787789 is 987787522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 225787789 - 2¹³ = 225779597 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 (225787729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36459 + ... + 42199.

It is an arithmetic number, because the mean of its divisors is an integer number (28698516).

Almost surely, 2^225787789 is an apocalyptic number.

It is an amenable number.

225787789 is a deficient number, since it is larger than the sum of its proper divisors (3800339).

225787789 is an equidigital number, since it uses as much as digits as its factorization.

225787789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6395.

The product of its digits is 3951360, while the sum is 55.

The square root of 225787789 is about 15026.2366878736. The cubic root of 225787789 is about 608.9292233432.

It can be divided in two parts, 225787 and 789, that added together give a square (226576 = 476²).

The spelling of 225787789 in words is "two hundred twenty-five million, seven hundred eighty-seven thousand, seven hundred eighty-nine".