63516218 has 4 divisors (see below), whose sum is σ = 95274330. Its totient is φ = 31758108.

The previous prime is 63516217. The next prime is 63516227. The reversal of 63516218 is 81261536.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 44182609 + 19333609 = 6647^2 + 4397^2 .

It is not an unprimeable number, because it can be changed into a prime (63516217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15879053 + ... + 15879056.

Almost surely, 2^63516218 is an apocalyptic number.

63516218 is a deficient number, since it is larger than the sum of its proper divisors (31758112).

63516218 is a wasteful number, since it uses less digits than its factorization.

63516218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31758111.

The product of its digits is 8640, while the sum is 32.

The square root of 63516218 is about 7969.7062681130. The cubic root of 63516218 is about 398.9895705634.

The spelling of 63516218 in words is "sixty-three million, five hundred sixteen thousand, two hundred eighteen".