1063631311 has 4 divisors (see below), whose sum is σ = 1064380192. Its totient is φ = 1062882432.

The previous prime is 1063631269. The next prime is 1063631321. The reversal of 1063631311 is 1131363601.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1131363601 = 257 ⋅4402193.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1063631311 is a prime.

It is a super-2 number, since 2×1063631311² = 2262623131479157442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1063631321) 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, 372306 + ... + 375151.

It is an arithmetic number, because the mean of its divisors is an integer number (266095048).

Almost surely, 2^1063631311 is an apocalyptic number.

1063631311 is a deficient number, since it is larger than the sum of its proper divisors (748881).

1063631311 is an equidigital number, since it uses as much as digits as its factorization.

1063631311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 748880.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 1063631311 is about 32613.3609276934. The cubic root of 1063631311 is about 1020.7758133925.

Adding to 1063631311 its reverse (1131363601), we get a palindrome (2194994912).

The spelling of 1063631311 in words is "one billion, sixty-three million, six hundred thirty-one thousand, three hundred eleven".