1325515161 has 4 divisors (see below), whose sum is σ = 1767353552. Its totient is φ = 883676772.

The previous prime is 1325515153. The next prime is 1325515171. The reversal of 1325515161 is 1615155231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1325515161 - 2³ = 1325515153 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1325515111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220919191 + ... + 220919196.

It is an arithmetic number, because the mean of its divisors is an integer number (441838388).

Almost surely, 2^1325515161 is an apocalyptic number.

It is an amenable number.

1325515161 is a deficient number, since it is larger than the sum of its proper divisors (441838391).

1325515161 is an equidigital number, since it uses as much as digits as its factorization.

1325515161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441838390.

The product of its digits is 4500, while the sum is 30.

The square root of 1325515161 is about 36407.6250392689. The cubic root of 1325515161 is about 1098.4869448086.

The spelling of 1325515161 in words is "one billion, three hundred twenty-five million, five hundred fifteen thousand, one hundred sixty-one".