320135225 has 12 divisors (see below), whose sum is σ = 401430780. Its totient is φ = 253228800.

The previous prime is 320135219. The next prime is 320135267. The reversal of 320135225 is 522531023.

It can be written as a sum of positive squares in 6 ways, for example, as 82882816 + 237252409 = 9104^2 + 15403^2 .

It is not a de Polignac number, because 320135225 - 2¹⁰ = 320134201 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 320135225.

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, 69716 + ... + 74165.

It is an arithmetic number, because the mean of its divisors is an integer number (33452565).

Almost surely, 2^320135225 is an apocalyptic number.

It is an amenable number.

320135225 is a deficient number, since it is larger than the sum of its proper divisors (81295555).

320135225 is a wasteful number, since it uses less digits than its factorization.

320135225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143980 (or 143975 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 320135225 is about 17892.3230744361. The cubic root of 320135225 is about 684.0867115598.

Adding to 320135225 its reverse (522531023), we get a palindrome (842666248).

The spelling of 320135225 in words is "three hundred twenty million, one hundred thirty-five thousand, two hundred twenty-five".