11631855 has 16 divisors (see below), whose sum is σ = 18822240. Its totient is φ = 6133248.

The previous prime is 11631853. The next prime is 11631877. The reversal of 11631855 is 55813611.

It is not a de Polignac number, because 11631855 - 2¹ = 11631853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11631853) 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, 3022 + ... + 5691.

It is an arithmetic number, because the mean of its divisors is an integer number (1176390).

Almost surely, 2^11631855 is an apocalyptic number.

11631855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11631855 is a deficient number, since it is larger than the sum of its proper divisors (7190385).

11631855 is an equidigital number, since it uses as much as digits as its factorization.

11631855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8810.

The product of its digits is 3600, while the sum is 30.

The square root of 11631855 is about 3410.5505420680. The cubic root of 11631855 is about 226.5772631363.

The spelling of 11631855 in words is "eleven million, six hundred thirty-one thousand, eight hundred fifty-five".