2011631263 has 4 divisors (see below), whose sum is σ = 2019458880. Its totient is φ = 2003803648.

The previous prime is 2011631239. The next prime is 2011631309. The reversal of 2011631263 is 3621361102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3621361102 = 2 ⋅1810680551.

It is a cyclic number.

It is not a de Polignac number, because 2011631263 - 2⁵ = 2011631231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011331263) 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, 3913423 + ... + 3913936.

It is an arithmetic number, because the mean of its divisors is an integer number (504864720).

Almost surely, 2^2011631263 is an apocalyptic number.

2011631263 is a deficient number, since it is larger than the sum of its proper divisors (7827617).

2011631263 is an equidigital number, since it uses as much as digits as its factorization.

2011631263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7827616.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 2011631263 is about 44851.2125031197. The cubic root of 2011631263 is about 1262.3587425919.

Adding to 2011631263 its reverse (3621361102), we get a palindrome (5632992365).

The spelling of 2011631263 in words is "two billion, eleven million, six hundred thirty-one thousand, two hundred sixty-three".