325281661 has 8 divisors (see below), whose sum is σ = 337159800. Its totient is φ = 313447680.

The previous prime is 325281641. The next prime is 325281673. The reversal of 325281661 is 166182523.

It can be written as a sum of positive squares in 4 ways, for example, as 3976036 + 321305625 = 1994^2 + 17925^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 325281661 - 2⁹ = 325281149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (325281641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4345 + ... + 25873.

It is an arithmetic number, because the mean of its divisors is an integer number (42144975).

Almost surely, 2^325281661 is an apocalyptic number.

It is an amenable number.

325281661 is a deficient number, since it is larger than the sum of its proper divisors (11878139).

325281661 is a wasteful number, since it uses less digits than its factorization.

325281661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22079.

The product of its digits is 17280, while the sum is 34.

The square root of 325281661 is about 18035.5665561135. The cubic root of 325281661 is about 687.7329932502.

The spelling of 325281661 in words is "three hundred twenty-five million, two hundred eighty-one thousand, six hundred sixty-one".