320445425 has 24 divisors (see below), whose sum is σ = 402474240. Its totient is φ = 253080000.

The previous prime is 320445421. The next prime is 320445439. The reversal of 320445425 is 524544023.

It is not a de Polignac number, because 320445425 - 2² = 320445421 is a prime.

It is not an unprimeable number, because it can be changed into a prime (320445421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1276550 + ... + 1276800.

It is an arithmetic number, because the mean of its divisors is an integer number (16769760).

Almost surely, 2^320445425 is an apocalyptic number.

It is an amenable number.

320445425 is a deficient number, since it is larger than the sum of its proper divisors (82028815).

320445425 is a wasteful number, since it uses less digits than its factorization.

320445425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713 (or 708 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 29.

The square root of 320445425 is about 17900.9894977903. The cubic root of 320445425 is about 684.3075923823.

Adding to 320445425 its reverse (524544023), we get a palindrome (844989448).

The spelling of 320445425 in words is "three hundred twenty million, four hundred forty-five thousand, four hundred twenty-five".