325657021 has 4 divisors (see below), whose sum is σ = 325741500. Its totient is φ = 325572544.

The previous prime is 325657009. The next prime is 325657043. The reversal of 325657021 is 120756523.

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 49632025 + 276024996 = 7045^2 + 16614^2 .

It is a cyclic number.

It is not a de Polignac number, because 325657021 - 2¹⁹ = 325132733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (325657001) 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, 36166 + ... + 44263.

It is an arithmetic number, because the mean of its divisors is an integer number (81435375).

Almost surely, 2^325657021 is an apocalyptic number.

It is an amenable number.

325657021 is a deficient number, since it is larger than the sum of its proper divisors (84479).

325657021 is an equidigital number, since it uses as much as digits as its factorization.

325657021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84478.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 325657021 is about 18045.9696608412. The cubic root of 325657021 is about 687.9974289216.

The spelling of 325657021 in words is "three hundred twenty-five million, six hundred fifty-seven thousand, twenty-one".