63855251 has 2 divisors, whose sum is σ = 63855252. Its totient is φ = 63855250.

The previous prime is 63855223. The next prime is 63855269. The reversal of 63855251 is 15255836.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63855251 - 2¹⁴ = 63838867 is a prime.

It is not a weakly prime, because it can be changed into another prime (63855551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31927625 + 31927626.

It is an arithmetic number, because the mean of its divisors is an integer number (31927626).

Almost surely, 2^63855251 is an apocalyptic number.

63855251 is a deficient number, since it is larger than the sum of its proper divisors (1).

63855251 is an equidigital number, since it uses as much as digits as its factorization.

63855251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36000, while the sum is 35.

The square root of 63855251 is about 7990.9480664061. The cubic root of 63855251 is about 399.6982119505.

The spelling of 63855251 in words is "sixty-three million, eight hundred fifty-five thousand, two hundred fifty-one".