11311655 has 16 divisors (see below), whose sum is σ = 13928544. Its totient is φ = 8816640.

The previous prime is 11311589. The next prime is 11311661. The reversal of 11311655 is 55611311.

11311655 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-11311655 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11311655.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40115 + ... + 40395.

It is an arithmetic number, because the mean of its divisors is an integer number (870534).

Almost surely, 2^11311655 is an apocalyptic number.

11311655 is a deficient number, since it is larger than the sum of its proper divisors (2616889).

11311655 is an equidigital number, since it uses as much as digits as its factorization.

11311655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466.

The product of its digits is 450, while the sum is 23.

The square root of 11311655 is about 3363.2803927119. The cubic root of 11311655 is about 224.4788266465.

Adding to 11311655 its reverse (55611311), we get a palindrome (66922966).

The spelling of 11311655 in words is "eleven million, three hundred eleven thousand, six hundred fifty-five".