63531444 has 12 divisors (see below), whose sum is σ = 148240064. Its totient is φ = 21177144.

The previous prime is 63531409. The next prime is 63531449. The reversal of 63531444 is 44413536.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63531449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2647132 + ... + 2647155.

Almost surely, 2^63531444 is an apocalyptic number.

It is an amenable number.

63531444 is an abundant number, since it is smaller than the sum of its proper divisors (84708620).

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

63531444 is a wasteful number, since it uses less digits than its factorization.

63531444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5294294 (or 5294292 counting only the distinct ones).

The product of its digits is 17280, while the sum is 30.

The square root of 63531444 is about 7970.6614531041. The cubic root of 63531444 is about 399.0214497172.

The spelling of 63531444 in words is "sixty-three million, five hundred thirty-one thousand, four hundred forty-four".