63681522 has 16 divisors (see below), whose sum is σ = 130073472. Its totient is φ = 20775440.

The previous prime is 63681517. The next prime is 63681523. The reversal of 63681522 is 22518636.

It is not an unprimeable number, because it can be changed into a prime (63681523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112629 + ... + 113192.

It is an arithmetic number, because the mean of its divisors is an integer number (8129592).

Almost surely, 2^63681522 is an apocalyptic number.

63681522 is an abundant number, since it is smaller than the sum of its proper divisors (66391950).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63681522 is a wasteful number, since it uses less digits than its factorization.

63681522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225873.

The product of its digits is 17280, while the sum is 33.

The square root of 63681522 is about 7980.0703004422. The cubic root of 63681522 is about 399.3354005471.

The spelling of 63681522 in words is "sixty-three million, six hundred eighty-one thousand, five hundred twenty-two".