32818561 has 2 divisors, whose sum is σ = 32818562. Its totient is φ = 32818560.

The previous prime is 32818547. The next prime is 32818571. The reversal of 32818561 is 16581823.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25310961 + 7507600 = 5031^2 + 2740^2 .

It is a cyclic number.

It is not a de Polignac number, because 32818561 - 2⁷ = 32818433 is a prime.

It is a super-2 number, since 2×32818561² = 2154115892221442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (32818571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16409280 + 16409281.

It is an arithmetic number, because the mean of its divisors is an integer number (16409281).

Almost surely, 2^32818561 is an apocalyptic number.

It is an amenable number.

32818561 is a deficient number, since it is larger than the sum of its proper divisors (1).

32818561 is an equidigital number, since it uses as much as digits as its factorization.

32818561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 34.

The square root of 32818561 is about 5728.7486417192. The cubic root of 32818561 is about 320.1645020087.

The spelling of 32818561 in words is "thirty-two million, eight hundred eighteen thousand, five hundred sixty-one".