225645773 has 4 divisors (see below), whose sum is σ = 227754720. Its totient is φ = 223536828.

The previous prime is 225645727. The next prime is 225645799. The reversal of 225645773 is 377546522.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 377546522 = 2 ⋅188773261.

It is a cyclic number.

It is not a de Polignac number, because 225645773 - 2⁸ = 225645517 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 225645773.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225645703) 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, 1054313 + ... + 1054526.

It is an arithmetic number, because the mean of its divisors is an integer number (56938680).

Almost surely, 2^225645773 is an apocalyptic number.

It is an amenable number.

225645773 is a deficient number, since it is larger than the sum of its proper divisors (2108947).

225645773 is a wasteful number, since it uses less digits than its factorization.

225645773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2108946.

The product of its digits is 352800, while the sum is 41.

The square root of 225645773 is about 15021.5103435041. The cubic root of 225645773 is about 608.8015284692.

The spelling of 225645773 in words is "two hundred twenty-five million, six hundred forty-five thousand, seven hundred seventy-three".