11831855 has 16 divisors (see below), whose sum is σ = 16787520. Its totient is φ = 7832832.

The previous prime is 11831849. The next prime is 11831857. The reversal of 11831855 is 55813811.

It is a happy number.

11831855 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11831855 - 2⁴ = 11831839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11831857) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4814 + ... + 6843.

It is an arithmetic number, because the mean of its divisors is an integer number (1049220).

Almost surely, 2^11831855 is an apocalyptic number.

11831855 is a deficient number, since it is larger than the sum of its proper divisors (4955665).

11831855 is a wasteful number, since it uses less digits than its factorization.

11831855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11698.

The product of its digits is 4800, while the sum is 32.

The square root of 11831855 is about 3439.7463569281. The cubic root of 11831855 is about 227.8684926969.

The spelling of 11831855 in words is "eleven million, eight hundred thirty-one thousand, eight hundred fifty-five".