63613231 has 16 divisors (see below), whose sum is σ = 71912448. Its totient is φ = 55770400.

The previous prime is 63613229. The next prime is 63613241. The reversal of 63613231 is 13231636.

It is a cyclic number.

It is not a de Polignac number, because 63613231 - 2¹ = 63613229 is a prime.

It is a super-2 number, since 2×63613231² = 8093286316518722, 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 = 63613196 and 63613205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63613241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35841 + ... + 37573.

It is an arithmetic number, because the mean of its divisors is an integer number (4494528).

Almost surely, 2^63613231 is an apocalyptic number.

63613231 is a deficient number, since it is larger than the sum of its proper divisors (8299217).

63613231 is a wasteful number, since it uses less digits than its factorization.

63613231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1862.

The product of its digits is 1944, while the sum is 25.

The square root of 63613231 is about 7975.7903056688. The cubic root of 63613231 is about 399.1926026202.

Adding to 63613231 its reverse (13231636), we get a palindrome (76844867).

The spelling of 63613231 in words is "sixty-three million, six hundred thirteen thousand, two hundred thirty-one".