245203342243 has 4 divisors (see below), whose sum is σ = 251183911608. Its totient is φ = 239222772880.

The previous prime is 245203342207. The next prime is 245203342253. The reversal of 245203342243 is 342243302542.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342243302542 = 2 ⋅171121651271.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245203342243 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 245203342199 and 245203342208.

It is not an unprimeable number, because it can be changed into a prime (245203342253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2990284621 + ... + 2990284702.

It is an arithmetic number, because the mean of its divisors is an integer number (62795977902).

Almost surely, 2^245203342243 is an apocalyptic number.

245203342243 is a deficient number, since it is larger than the sum of its proper divisors (5980569365).

245203342243 is an equidigital number, since it uses as much as digits as its factorization.

245203342243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5980569364.

The product of its (nonzero) digits is 138240, while the sum is 34.

Adding to 245203342243 its reverse (342243302542), we get a palindrome (587446644785).

The spelling of 245203342243 in words is "two hundred forty-five billion, two hundred three million, three hundred forty-two thousand, two hundred forty-three".