245131203245 has 4 divisors (see below), whose sum is σ = 294157443900. Its totient is φ = 196104962592.

The previous prime is 245131203221. The next prime is 245131203257. The reversal of 245131203245 is 542302131542.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 56988670729 + 188142532516 = 238723^2 + 433754^2 .

It is a cyclic number.

It is not a de Polignac number, because 245131203245 - 2⁶ = 245131203181 is a prime.

It is a congruent 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, 24513120320 + ... + 24513120329.

It is an arithmetic number, because the mean of its divisors is an integer number (73539360975).

Almost surely, 2^245131203245 is an apocalyptic number.

It is an amenable number.

245131203245 is a deficient number, since it is larger than the sum of its proper divisors (49026240655).

245131203245 is an equidigital number, since it uses as much as digits as its factorization.

245131203245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49026240654.

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 245131203245 its reverse (542302131542), we get a palindrome (787433334787).

The spelling of 245131203245 in words is "two hundred forty-five billion, one hundred thirty-one million, two hundred three thousand, two hundred forty-five".