245443505 has 4 divisors (see below), whose sum is σ = 294532212. Its totient is φ = 196354800.

The previous prime is 245443493. The next prime is 245443519. The reversal of 245443505 is 505344542.

245443505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 505344542 = 2 ⋅252672271.

It can be written as a sum of positive squares in 2 ways, for example, as 113124496 + 132319009 = 10636^2 + 11503^2 .

It is not a de Polignac number, because 245443505 - 2⁴ = 245443489 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24544346 + ... + 24544355.

It is an arithmetic number, because the mean of its divisors is an integer number (73633053).

Almost surely, 2^245443505 is an apocalyptic number.

It is an amenable number.

245443505 is a deficient number, since it is larger than the sum of its proper divisors (49088707).

245443505 is an equidigital number, since it uses as much as digits as its factorization.

245443505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49088706.

The product of its (nonzero) digits is 48000, while the sum is 32.

The square root of 245443505 is about 15666.6366843685. The cubic root of 245443505 is about 626.1098190495.

The spelling of 245443505 in words is "two hundred forty-five million, four hundred forty-three thousand, five hundred five".