34656221 has 2 divisors, whose sum is σ = 34656222. Its totient is φ = 34656220.

The previous prime is 34656203. The next prime is 34656229. The reversal of 34656221 is 12265643.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32330596 + 2325625 = 5686^2 + 1525^2 .

It is a cyclic number.

It is not a de Polignac number, because 34656221 - 2⁶ = 34656157 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (34656229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17328110 + 17328111.

It is an arithmetic number, because the mean of its divisors is an integer number (17328111).

Almost surely, 2^34656221 is an apocalyptic number.

It is an amenable number.

34656221 is a deficient number, since it is larger than the sum of its proper divisors (1).

34656221 is an equidigital number, since it uses as much as digits as its factorization.

34656221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 29.

The square root of 34656221 is about 5886.9534565852. The cubic root of 34656221 is about 326.0321301464.

The spelling of 34656221 in words is "thirty-four million, six hundred fifty-six thousand, two hundred twenty-one".