63521534 has 16 divisors (see below), whose sum is σ = 98653248. Its totient is φ = 30655872.

The previous prime is 63521519. The next prime is 63521539. The reversal of 63521534 is 43512536.

It is a junction number, because it is equal to n+sod(n) for n = 63521497 and 63521506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63521539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2234 + ... + 11490.

It is an arithmetic number, because the mean of its divisors is an integer number (6165828).

Almost surely, 2^63521534 is an apocalyptic number.

63521534 is a deficient number, since it is larger than the sum of its proper divisors (35131714).

63521534 is a wasteful number, since it uses less digits than its factorization.

63521534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9379.

The product of its digits is 10800, while the sum is 29.

The square root of 63521534 is about 7970.0397740538. The cubic root of 63521534 is about 399.0007014181. Note that the first 3 decimals are identical.

The spelling of 63521534 in words is "sixty-three million, five hundred twenty-one thousand, five hundred thirty-four".