225377685 has 24 divisors (see below), whose sum is σ = 420706104. Its totient is φ = 110954880.

The previous prime is 225377683. The next prime is 225377729. The reversal of 225377685 is 586773522.

It can be written as a sum of positive squares in 4 ways, for example, as 4498641 + 220879044 = 2121^2 + 14862^2 .

It is not a de Polignac number, because 225377685 - 2¹ = 225377683 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 225377685.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225377681) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 192046 + ... + 193215.

It is an arithmetic number, because the mean of its divisors is an integer number (17529421).

Almost surely, 2^225377685 is an apocalyptic number.

It is an amenable number.

225377685 is a deficient number, since it is larger than the sum of its proper divisors (195328419).

225377685 is a wasteful number, since it uses less digits than its factorization.

225377685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385285 (or 385282 counting only the distinct ones).

The product of its digits is 705600, while the sum is 45.

The square root of 225377685 is about 15012.5842212459. The cubic root of 225377685 is about 608.5603287903.

The spelling of 225377685 in words is "two hundred twenty-five million, three hundred seventy-seven thousand, six hundred eighty-five".