325161905 has 4 divisors (see below), whose sum is σ = 390194292. Its totient is φ = 260129520.

The previous prime is 325161899. The next prime is 325161917. The reversal of 325161905 is 509161523.

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 113401201 + 211760704 = 10649^2 + 14552^2 .

It is not a de Polignac number, because 325161905 - 2⁶ = 325161841 is a prime.

It is a Duffinian 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, 32516186 + ... + 32516195.

It is an arithmetic number, because the mean of its divisors is an integer number (97548573).

Almost surely, 2^325161905 is an apocalyptic number.

It is an amenable number.

325161905 is a deficient number, since it is larger than the sum of its proper divisors (65032387).

325161905 is an equidigital number, since it uses as much as digits as its factorization.

325161905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65032386.

The product of its (nonzero) digits is 8100, while the sum is 32.

The square root of 325161905 is about 18032.2462549733. The cubic root of 325161905 is about 687.6485840837.

It can be divided in two parts, 3251 and 61905, that added together give a palindrome (65156).

The spelling of 325161905 in words is "three hundred twenty-five million, one hundred sixty-one thousand, nine hundred five".