63521334 has 40 divisors (see below), whose sum is σ = 143013288. Its totient is φ = 21072960.

The previous prime is 63521317. The next prime is 63521399. The reversal of 63521334 is 43312536.

It is a happy number.

63521334 is a `hidden beast` number, since 635 + 21 + 3 + 3 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 63521298 and 63521307.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 38229 + ... + 39855.

Almost surely, 2^63521334 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63521334, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71506644).

63521334 is an abundant number, since it is smaller than the sum of its proper divisors (79491954).

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

63521334 is a wasteful number, since it uses less digits than its factorization.

63521334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1882 (or 1873 counting only the distinct ones).

The product of its digits is 6480, while the sum is 27.

The square root of 63521334 is about 7970.0272270551. The cubic root of 63521334 is about 399.0002826613. Note that the first 3 decimals are identical.

The spelling of 63521334 in words is "sixty-three million, five hundred twenty-one thousand, three hundred thirty-four".