11231631 has 6 divisors (see below), whose sum is σ = 16223480. Its totient is φ = 7487748.

The previous prime is 11231629. The next prime is 11231639. The reversal of 11231631 is 13613211.

11231631 is a `hidden beast` number, since 1 + 1 + 2 + 31 + 631 = 666.

It is not a de Polignac number, because 11231631 - 2¹ = 11231629 is a prime.

It is a super-2 number, since 2×11231631² = 252299069840322, 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 (11231639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 623971 + ... + 623988.

Almost surely, 2^11231631 is an apocalyptic number.

11231631 is a deficient number, since it is larger than the sum of its proper divisors (4991849).

11231631 is a wasteful number, since it uses less digits than its factorization.

11231631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1247965 (or 1247962 counting only the distinct ones).

The product of its digits is 108, while the sum is 18.

The square root of 11231631 is about 3351.3625587215. The cubic root of 11231631 is about 223.9482169309.

Adding to 11231631 its reverse (13613211), we get a palindrome (24844842).

The spelling of 11231631 in words is "eleven million, two hundred thirty-one thousand, six hundred thirty-one".