225521750 has 16 divisors (see below), whose sum is σ = 422177184. Its totient is φ = 90208600.

The previous prime is 225521741. The next prime is 225521759. The reversal of 225521750 is 57125522.

It is an interprime number because it is at equal distance from previous prime (225521741) and next prime (225521759).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225521759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 450794 + ... + 451293.

It is an arithmetic number, because the mean of its divisors is an integer number (26386074).

Almost surely, 2^225521750 is an apocalyptic number.

225521750 is a deficient number, since it is larger than the sum of its proper divisors (196655434).

225521750 is an equidigital number, since it uses as much as digits as its factorization.

225521750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902104 (or 902094 counting only the distinct ones).

The product of its (nonzero) digits is 7000, while the sum is 29.

The square root of 225521750 is about 15017.3815960040. The cubic root of 225521750 is about 608.6899683180.

The spelling of 225521750 in words is "two hundred twenty-five million, five hundred twenty-one thousand, seven hundred fifty".