225921982 has 32 divisors (see below), whose sum is σ = 401063040. Its totient is φ = 94093920.

The previous prime is 225921973. The next prime is 225922003. The reversal of 225921982 is 289129522.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36913 + ... + 42595.

It is an arithmetic number, because the mean of its divisors is an integer number (12533220).

Almost surely, 2^225921982 is an apocalyptic number.

225921982 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

225921982 is a deficient number, since it is larger than the sum of its proper divisors (175141058).

225921982 is a wasteful number, since it uses less digits than its factorization.

225921982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5848.

The product of its digits is 51840, while the sum is 40.

The square root of 225921982 is about 15030.7013143100. The cubic root of 225921982 is about 609.0498349089.

The spelling of 225921982 in words is "two hundred twenty-five million, nine hundred twenty-one thousand, nine hundred eighty-two".