63243855 has 16 divisors (see below), whose sum is σ = 112433760. Its totient is φ = 33729984.

The previous prime is 63243847. The next prime is 63243857. The reversal of 63243855 is 55834236.

It is a happy number.

63243855 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 63243855 - 2³ = 63243847 is a prime.

It is a super-2 number, since 2×63243855² = 7999570390522050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63243857) 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 in 15 ways as a sum of consecutive naturals, for example, 234102 + ... + 234371.

It is an arithmetic number, because the mean of its divisors is an integer number (7027110).

Almost surely, 2^63243855 is an apocalyptic number.

63243855 is a deficient number, since it is larger than the sum of its proper divisors (49189905).

63243855 is a wasteful number, since it uses less digits than its factorization.

63243855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468487 (or 468481 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 63243855 is about 7952.6005180695. The cubic root of 63243855 is about 398.4184529303.

The spelling of 63243855 in words is "sixty-three million, two hundred forty-three thousand, eight hundred fifty-five".