320243135225 has 48 divisors (see below), whose sum is σ = 446788070400. Its totient is φ = 225927947520.

The previous prime is 320243135209. The next prime is 320243135231. The reversal of 320243135225 is 522531342023.

It is not a de Polignac number, because 320243135225 - 2⁴ = 320243135209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 320243135191 and 320243135200.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6170936 + ... + 6222614.

It is an arithmetic number, because the mean of its divisors is an integer number (9308084800).

Almost surely, 2^320243135225 is an apocalyptic number.

It is an amenable number.

320243135225 is a deficient number, since it is larger than the sum of its proper divisors (126544935175).

320243135225 is a wasteful number, since it uses less digits than its factorization.

320243135225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52554 (or 52549 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 32.

Adding to 320243135225 its reverse (522531342023), we get a palindrome (842774477248).

The spelling of 320243135225 in words is "three hundred twenty billion, two hundred forty-three million, one hundred thirty-five thousand, two hundred twenty-five".