325520231 has 4 divisors (see below), whose sum is σ = 326062464. Its totient is φ = 324978000.

The previous prime is 325520207. The next prime is 325520281. The reversal of 325520231 is 132025523.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-325520231 is a prime.

It is a super-2 number, since 2×325520231² = 211926841580586722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 325520197 and 325520206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (325520201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 270215 + ... + 271416.

It is an arithmetic number, because the mean of its divisors is an integer number (81515616).

Almost surely, 2^325520231 is an apocalyptic number.

325520231 is a deficient number, since it is larger than the sum of its proper divisors (542233).

325520231 is an equidigital number, since it uses as much as digits as its factorization.

325520231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542232.

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

The square root of 325520231 is about 18042.1792198171. The cubic root of 325520231 is about 687.9010858958.

Adding to 325520231 its reverse (132025523), we get a palindrome (457545754).

The spelling of 325520231 in words is "three hundred twenty-five million, five hundred twenty thousand, two hundred thirty-one".