11506631 has 4 divisors (see below), whose sum is σ = 11513664. Its totient is φ = 11499600.

The previous prime is 11506619. The next prime is 11506633. The reversal of 11506631 is 13660511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 11506631 - 2⁶ = 11506567 is a prime.

It is a super-2 number, since 2×11506631² = 264805113940322, 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 = 11506597 and 11506606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11506633) 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, 371 + ... + 4811.

It is an arithmetic number, because the mean of its divisors is an integer number (2878416).

Almost surely, 2^11506631 is an apocalyptic number.

11506631 is a deficient number, since it is larger than the sum of its proper divisors (7033).

11506631 is an equidigital number, since it uses as much as digits as its factorization.

11506631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7032.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 11506631 is about 3392.1425382787. The cubic root of 11506631 is about 225.7612470671.

The spelling of 11506631 in words is "eleven million, five hundred six thousand, six hundred thirty-one".