63521390 has 8 divisors (see below), whose sum is σ = 114338520. Its totient is φ = 25408552.

The previous prime is 63521317. The next prime is 63521399. The reversal of 63521390 is 9312536.

63521390 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63521399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3176060 + ... + 3176079.

It is an arithmetic number, because the mean of its divisors is an integer number (14292315).

Almost surely, 2^63521390 is an apocalyptic number.

63521390 is a deficient number, since it is larger than the sum of its proper divisors (50817130).

63521390 is a wasteful number, since it uses less digits than its factorization.

63521390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6352146.

The product of its (nonzero) digits is 4860, while the sum is 29.

The square root of 63521390 is about 7970.0307402168. The cubic root of 63521390 is about 399.0003999133. Note that the first 3 decimals are identical.

The spelling of 63521390 in words is "sixty-three million, five hundred twenty-one thousand, three hundred ninety".