63755221 has 2 divisors, whose sum is σ = 63755222. Its totient is φ = 63755220.

The previous prime is 63755213. The next prime is 63755261. The reversal of 63755221 is 12255736.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41088100 + 22667121 = 6410^2 + 4761^2 .

It is a cyclic number.

It is not a de Polignac number, because 63755221 - 2³ = 63755213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63755261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31877610 + 31877611.

It is an arithmetic number, because the mean of its divisors is an integer number (31877611).

Almost surely, 2^63755221 is an apocalyptic number.

It is an amenable number.

63755221 is a deficient number, since it is larger than the sum of its proper divisors (1).

63755221 is an equidigital number, since it uses as much as digits as its factorization.

63755221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12600, while the sum is 31.

The square root of 63755221 is about 7984.6866563441. The cubic root of 63755221 is about 399.4893922266.

The spelling of 63755221 in words is "sixty-three million, seven hundred fifty-five thousand, two hundred twenty-one".