11388331 has 4 divisors (see below), whose sum is σ = 11494872. Its totient is φ = 11281792.

The previous prime is 11388319. The next prime is 11388337. The reversal of 11388331 is 13388311.

11388331 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13388311 = 31 ⋅431881.

It is a cyclic number.

It is not a de Polignac number, because 11388331 - 2¹¹ = 11386283 is a prime.

It is a super-2 number, since 2×11388331² = 259388165931122, which contains 22 as substring.

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 11388331.

It is not an unprimeable number, because it can be changed into a prime (11388337) 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, 53110 + ... + 53323.

It is an arithmetic number, because the mean of its divisors is an integer number (2873718).

Almost surely, 2^11388331 is an apocalyptic number.

11388331 is a deficient number, since it is larger than the sum of its proper divisors (106541).

11388331 is a wasteful number, since it uses less digits than its factorization.

11388331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106540.

The product of its digits is 1728, while the sum is 28.

The square root of 11388331 is about 3374.6601310354. The cubic root of 11388331 is about 224.9848944592.

The spelling of 11388331 in words is "eleven million, three hundred eighty-eight thousand, three hundred thirty-one".