245305505 has 4 divisors (see below), whose sum is σ = 294366612. Its totient is φ = 196244400.

The previous prime is 245305493. The next prime is 245305547. The reversal of 245305505 is 505503542.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 505503542 = 2 ⋅252751771.

It can be written as a sum of positive squares in 2 ways, for example, as 132181009 + 113124496 = 11497^2 + 10636^2 .

It is not a de Polignac number, because 245305505 - 2⁶ = 245305441 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 24530546 + ... + 24530555.

It is an arithmetic number, because the mean of its divisors is an integer number (73591653).

Almost surely, 2^245305505 is an apocalyptic number.

It is an amenable number.

245305505 is a deficient number, since it is larger than the sum of its proper divisors (49061107).

245305505 is an equidigital number, since it uses as much as digits as its factorization.

245305505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49061106.

The product of its (nonzero) digits is 15000, while the sum is 29.

The square root of 245305505 is about 15662.2318013749. The cubic root of 245305505 is about 625.9924541548.

The spelling of 245305505 in words is "two hundred forty-five million, three hundred five thousand, five hundred five".