325431661 has 2 divisors, whose sum is σ = 325431662. Its totient is φ = 325431660.

The previous prime is 325431643. The next prime is 325431763. The reversal of 325431661 is 166134523.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 181575625 + 143856036 = 13475^2 + 11994^2 .

It is a cyclic number.

It is not a de Polignac number, because 325431661 - 2¹⁷ = 325300589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (325431061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162715830 + 162715831.

It is an arithmetic number, because the mean of its divisors is an integer number (162715831).

Almost surely, 2^325431661 is an apocalyptic number.

It is an amenable number.

325431661 is a deficient number, since it is larger than the sum of its proper divisors (1).

325431661 is an equidigital number, since it uses as much as digits as its factorization.

325431661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 31.

The square root of 325431661 is about 18039.7245267216. The cubic root of 325431661 is about 687.8386904643.

The spelling of 325431661 in words is "three hundred twenty-five million, four hundred thirty-one thousand, six hundred sixty-one".