63218955 has 16 divisors (see below), whose sum is σ = 101249280. Its totient is φ = 33683808.

The previous prime is 63218933. The next prime is 63218959. The reversal of 63218955 is 55981236.

It is not a de Polignac number, because 63218955 - 2¹⁵ = 63186187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63218959) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27064 + ... + 29306.

It is an arithmetic number, because the mean of its divisors is an integer number (6328080).

Almost surely, 2^63218955 is an apocalyptic number.

63218955 is a deficient number, since it is larger than the sum of its proper divisors (38030325).

63218955 is a wasteful number, since it uses less digits than its factorization.

63218955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4130.

The product of its digits is 64800, while the sum is 39.

The square root of 63218955 is about 7951.0348383088. The cubic root of 63218955 is about 398.3661584071.

The spelling of 63218955 in words is "sixty-three million, two hundred eighteen thousand, nine hundred fifty-five".