11856631 has 4 divisors (see below), whose sum is σ = 12051064. Its totient is φ = 11662200.

The previous prime is 11856629. The next prime is 11856641. The reversal of 11856631 is 13665811.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11856631 - 2¹ = 11856629 is a prime.

It is a super-2 number, since 2×11856631² = 281159397340322, 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 = 11856593 and 11856602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11856641) 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, 97125 + ... + 97246.

It is an arithmetic number, because the mean of its divisors is an integer number (3012766).

Almost surely, 2^11856631 is an apocalyptic number.

11856631 is a deficient number, since it is larger than the sum of its proper divisors (194433).

11856631 is an equidigital number, since it uses as much as digits as its factorization.

11856631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194432.

The product of its digits is 4320, while the sum is 31.

The square root of 11856631 is about 3443.3459018809. The cubic root of 11856631 is about 228.0274346284.

The spelling of 11856631 in words is "eleven million, eight hundred fifty-six thousand, six hundred thirty-one".