225215550 has 288 divisors, whose sum is σ = 752094720. Its totient is φ = 47174400.

The previous prime is 225215539. The next prime is 225215561. The reversal of 225215550 is 55512522.

225215550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (225215539) and next prime (225215561).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 3172015 + ... + 3172085.

It is an arithmetic number, because the mean of its divisors is an integer number (2611440).

Almost surely, 2^225215550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 225215550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (376047360).

225215550 is an abundant number, since it is smaller than the sum of its proper divisors (526879170).

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

225215550 is a wasteful number, since it uses less digits than its factorization.

225215550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168 (or 160 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 27.

The square root of 225215550 is about 15007.1832800163. The cubic root of 225215550 is about 608.4143625515.

The spelling of 225215550 in words is "two hundred twenty-five million, two hundred fifteen thousand, five hundred fifty".