225981766 has 8 divisors (see below), whose sum is σ = 339433560. Its totient is φ = 112837248.

The previous prime is 225981761. The next prime is 225981823. The reversal of 225981766 is 667189522.

225981766 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225981761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74971 + ... + 77926.

It is an arithmetic number, because the mean of its divisors is an integer number (42429195).

Almost surely, 2^225981766 is an apocalyptic number.

225981766 is a deficient number, since it is larger than the sum of its proper divisors (113451794).

225981766 is a wasteful number, since it uses less digits than its factorization.

225981766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153638.

The product of its digits is 362880, while the sum is 46.

The square root of 225981766 is about 15032.6899123211. The cubic root of 225981766 is about 609.1035528985.

The spelling of 225981766 in words is "two hundred twenty-five million, nine hundred eighty-one thousand, seven hundred sixty-six".