32455681 has 2 divisors, whose sum is σ = 32455682. Its totient is φ = 32455680.

The previous prime is 32455679. The next prime is 32455693. The reversal of 32455681 is 18655423.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30470400 + 1985281 = 5520^2 + 1409^2 .

It is an emirp because it is prime and its reverse (18655423) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 32455681 - 2¹ = 32455679 is a prime.

It is a super-2 number, since 2×32455681² = 2106742458347522, which contains 22 as substring.

Together with 32455679, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (32455651) 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 as a sum of consecutive naturals, namely, 16227840 + 16227841.

It is an arithmetic number, because the mean of its divisors is an integer number (16227841).

Almost surely, 2^32455681 is an apocalyptic number.

It is an amenable number.

32455681 is a deficient number, since it is larger than the sum of its proper divisors (1).

32455681 is an equidigital number, since it uses as much as digits as its factorization.

32455681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28800, while the sum is 34.

The square root of 32455681 is about 5696.9887660061. The cubic root of 32455681 is about 318.9800893617.

The spelling of 32455681 in words is "thirty-two million, four hundred fifty-five thousand, six hundred eighty-one".