320303725 has 12 divisors (see below), whose sum is σ = 453916384. Its totient is φ = 219636720.

The previous prime is 320303719. The next prime is 320303747. The reversal of 320303725 is 527303023.

It is a happy number.

It is not a de Polignac number, because 320303725 - 2³ = 320303717 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 320303725.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 914979 + ... + 915328.

Almost surely, 2^320303725 is an apocalyptic number.

320303725 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

320303725 is a deficient number, since it is larger than the sum of its proper divisors (133612659).

320303725 is a wasteful number, since it uses less digits than its factorization.

320303725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1830324 (or 1830319 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 25.

The square root of 320303725 is about 17897.0311783826. The cubic root of 320303725 is about 684.2067112603.

Adding to 320303725 its reverse (527303023), we get a palindrome (847606748).

The spelling of 320303725 in words is "three hundred twenty million, three hundred three thousand, seven hundred twenty-five".