225444381 has 8 divisors (see below), whose sum is σ = 300663744. Its totient is φ = 150260640.

The previous prime is 225444371. The next prime is 225444391. The reversal of 225444381 is 183444522.

It is an interprime number because it is at equal distance from previous prime (225444371) and next prime (225444391).

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

It is not a de Polignac number, because 225444381 - 2¹⁰ = 225443357 is a prime.

It is a super-2 number, since 2×225444381² = 101650337848946322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225444341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15145 + ... + 26081.

It is an arithmetic number, because the mean of its divisors is an integer number (37582968).

Almost surely, 2^225444381 is an apocalyptic number.

It is an amenable number.

225444381 is a deficient number, since it is larger than the sum of its proper divisors (75219363).

225444381 is a wasteful number, since it uses less digits than its factorization.

225444381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17811.

The product of its digits is 30720, while the sum is 33.

The square root of 225444381 is about 15014.8053933443. The cubic root of 225444381 is about 608.6203532725.

The spelling of 225444381 in words is "two hundred twenty-five million, four hundred forty-four thousand, three hundred eighty-one".