63481531 has 4 divisors (see below), whose sum is σ = 63504064. Its totient is φ = 63459000.

The previous prime is 63481513. The next prime is 63481567. The reversal of 63481531 is 13518436.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 63481531 - 2¹¹ = 63479483 is a prime.

It is a super-2 number, since 2×63481531² = 8059809556207922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 63481493 and 63481502.

It is not an unprimeable number, because it can be changed into a prime (63481501) 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, 6315 + ... + 12916.

It is an arithmetic number, because the mean of its divisors is an integer number (15876016).

Almost surely, 2^63481531 is an apocalyptic number.

63481531 is a deficient number, since it is larger than the sum of its proper divisors (22533).

63481531 is a wasteful number, since it uses less digits than its factorization.

63481531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22532.

The product of its digits is 8640, while the sum is 31.

The square root of 63481531 is about 7967.5297928530. The cubic root of 63481531 is about 398.9169262751.

Adding to 63481531 its reverse (13518436), we get a palindrome (76999967).

The spelling of 63481531 in words is "sixty-three million, four hundred eighty-one thousand, five hundred thirty-one".