325813581 has 6 divisors (see below), whose sum is σ = 470619630. Its totient is φ = 217209048.

The previous prime is 325813571. The next prime is 325813583. The reversal of 325813581 is 185318523.

It can be written as a sum of positive squares in only one way, i.e., 257602500 + 68211081 = 16050^2 + 8259^2 .

It is not a de Polignac number, because 325813581 - 2¹¹ = 325811533 is a prime.

It is a super-2 number, since 2×325813581² = 212308979128087122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (325813583) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18100746 + ... + 18100763.

It is an arithmetic number, because the mean of its divisors is an integer number (78436605).

Almost surely, 2^325813581 is an apocalyptic number.

It is an amenable number.

325813581 is a deficient number, since it is larger than the sum of its proper divisors (144806049).

325813581 is a wasteful number, since it uses less digits than its factorization.

325813581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36201515 (or 36201512 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 325813581 is about 18050.3069502987. The cubic root of 325813581 is about 688.1076631190.

The spelling of 325813581 in words is "three hundred twenty-five million, eight hundred thirteen thousand, five hundred eighty-one".