225681550 has 24 divisors (see below), whose sum is σ = 433311552. Its totient is φ = 87360000.

The previous prime is 225681541. The next prime is 225681551. The reversal of 225681550 is 55186522.

225681550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225681551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71251 + ... + 74350.

It is an arithmetic number, because the mean of its divisors is an integer number (18054648).

Almost surely, 2^225681550 is an apocalyptic number.

225681550 is a deficient number, since it is larger than the sum of its proper divisors (207630002).

225681550 is a wasteful number, since it uses less digits than its factorization.

225681550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145644 (or 145639 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 34.

The square root of 225681550 is about 15022.7011552517. The cubic root of 225681550 is about 608.8337027054.

The spelling of 225681550 in words is "two hundred twenty-five million, six hundred eighty-one thousand, five hundred fifty".