245405223 has 24 divisors (see below), whose sum is σ = 408084768. Its totient is φ = 139203072.

The previous prime is 245405191. The next prime is 245405327. The reversal of 245405223 is 322504542.

It is a happy number.

It is not a de Polignac number, because 245405223 - 2⁵ = 245405191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245405023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5586 + ... + 22847.

It is an arithmetic number, because the mean of its divisors is an integer number (17003532).

Almost surely, 2^245405223 is an apocalyptic number.

245405223 is a deficient number, since it is larger than the sum of its proper divisors (162679545).

245405223 is a wasteful number, since it uses less digits than its factorization.

245405223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28583 (or 28580 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

The square root of 245405223 is about 15665.4148684291. The cubic root of 245405223 is about 626.0772657574.

Adding to 245405223 its reverse (322504542), we get a palindrome (567909765).

The spelling of 245405223 in words is "two hundred forty-five million, four hundred five thousand, two hundred twenty-three".