11388131 has 4 divisors (see below), whose sum is σ = 11470200. Its totient is φ = 11306064.

The previous prime is 11388127. The next prime is 11388137. The reversal of 11388131 is 13188311.

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 11388131 - 2² = 11388127 is a prime.

It is a super-2 number, since 2×11388131² = 259379055346322, 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 11388131.

It is not an unprimeable number, because it can be changed into a prime (11388137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40826 + ... + 41103.

It is an arithmetic number, because the mean of its divisors is an integer number (2867550).

Almost surely, 2^11388131 is an apocalyptic number.

11388131 is a deficient number, since it is larger than the sum of its proper divisors (82069).

11388131 is an equidigital number, since it uses as much as digits as its factorization.

11388131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82068.

The product of its digits is 576, while the sum is 26.

The square root of 11388131 is about 3374.6304982916. The cubic root of 11388131 is about 224.9835774022.

The spelling of 11388131 in words is "eleven million, three hundred eighty-eight thousand, one hundred thirty-one".