225444613 has 4 divisors (see below), whose sum is σ = 227551680. Its totient is φ = 223337548.

The previous prime is 225444601. The next prime is 225444641. The reversal of 225444613 is 316444522.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225444613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225444013) 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, 1053373 + ... + 1053586.

It is an arithmetic number, because the mean of its divisors is an integer number (56887920).

Almost surely, 2^225444613 is an apocalyptic number.

It is an amenable number.

225444613 is a deficient number, since it is larger than the sum of its proper divisors (2107067).

225444613 is a wasteful number, since it uses less digits than its factorization.

225444613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2107066.

The product of its digits is 23040, while the sum is 31.

The square root of 225444613 is about 15014.8131190501. The cubic root of 225444613 is about 608.6205620452.

Subtracting 225444613 from its reverse (316444522), we obtain a palindrome (90999909).

The spelling of 225444613 in words is "two hundred twenty-five million, four hundred forty-four thousand, six hundred thirteen".