2011631447 has 12 divisors (see below), whose sum is σ = 2415548736. Its totient is φ = 1668633120.

The previous prime is 2011631407. The next prime is 2011631449. The reversal of 2011631447 is 7441361102.

It is a happy number.

It is not a de Polignac number, because 2011631447 - 2⁸ = 2011631191 is a prime.

It is a super-2 number, since 2×2011631447² = 8093322157118627618, 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 (2011631449) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 660638 + ... + 663675.

It is an arithmetic number, because the mean of its divisors is an integer number (201295728).

Almost surely, 2^2011631447 is an apocalyptic number.

2011631447 is a deficient number, since it is larger than the sum of its proper divisors (403917289).

2011631447 is a wasteful number, since it uses less digits than its factorization.

2011631447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1324358 (or 1324351 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 2011631447 is about 44851.2145543462. The cubic root of 2011631447 is about 1262.3587810804.

Adding to 2011631447 its reverse (7441361102), we get a palindrome (9452992549).

The spelling of 2011631447 in words is "two billion, eleven million, six hundred thirty-one thousand, four hundred forty-seven".