225787700 has 18 divisors (see below), whose sum is σ = 489959526. Its totient is φ = 90315040.

The previous prime is 225787691. The next prime is 225787703. The reversal of 225787700 is 7787522.

It can be written as a sum of positive squares in 3 ways, for example, as 46977316 + 178810384 = 6854^2 + 13372^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225787703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1128839 + ... + 1129038.

Almost surely, 2^225787700 is an apocalyptic number.

225787700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225787700 is an abundant number, since it is smaller than the sum of its proper divisors (264171826).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

225787700 is a wasteful number, since it uses less digits than its factorization.

225787700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2257891 (or 2257884 counting only the distinct ones).

The product of its (nonzero) digits is 54880, while the sum is 38.

The square root of 225787700 is about 15026.2337263867. The cubic root of 225787700 is about 608.9291433349.

The spelling of 225787700 in words is "two hundred twenty-five million, seven hundred eighty-seven thousand, seven hundred".