63531140 has 24 divisors (see below), whose sum is σ = 136671192. Its totient is φ = 24792320.

The previous prime is 63531133. The next prime is 63531151. The reversal of 63531140 is 4113536.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4056196 + 59474944 = 2014^2 + 7712^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37919 + ... + 39558.

It is an arithmetic number, because the mean of its divisors is an integer number (5694633).

Almost surely, 2^63531140 is an apocalyptic number.

It is an amenable number.

63531140 is an abundant number, since it is smaller than the sum of its proper divisors (73140052).

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

63531140 is a wasteful number, since it uses less digits than its factorization.

63531140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77527 (or 77525 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 63531140 is about 7970.6423831458. The cubic root of 63531140 is about 399.0208132727.

Adding to 63531140 its reverse (4113536), we get a palindrome (67644676).

The spelling of 63531140 in words is "sixty-three million, five hundred thirty-one thousand, one hundred forty".