225444643 has 4 divisors (see below), whose sum is σ = 235246608. Its totient is φ = 215642680.

The previous prime is 225444641. The next prime is 225444697. The reversal of 225444643 is 346444522.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 225444643 - 2¹ = 225444641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 225444599 and 225444608.

It is not an unprimeable number, because it can be changed into a prime (225444641) 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 3 ways as a sum of consecutive naturals, for example, 4900948 + ... + 4900993.

It is an arithmetic number, because the mean of its divisors is an integer number (58811652).

Almost surely, 2^225444643 is an apocalyptic number.

225444643 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

225444643 is a deficient number, since it is larger than the sum of its proper divisors (9801965).

225444643 is an equidigital number, since it uses as much as digits as its factorization.

225444643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9801964.

The product of its digits is 92160, while the sum is 34.

The square root of 225444643 is about 15014.8141180635. The cubic root of 225444643 is about 608.6205890417.

The spelling of 225444643 in words is "two hundred twenty-five million, four hundred forty-four thousand, six hundred forty-three".