11555131 has 12 divisors (see below), whose sum is σ = 14027472. Its totient is φ = 9472848.

The previous prime is 11555129. The next prime is 11555143. The reversal of 11555131 is 13155511.

It is not a de Polignac number, because 11555131 - 2¹ = 11555129 is a prime.

It is a super-2 number, since 2×11555131² = 267042104854322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11555161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4000 + ... + 6253.

It is an arithmetic number, because the mean of its divisors is an integer number (1168956).

Almost surely, 2^11555131 is an apocalyptic number.

11555131 is a deficient number, since it is larger than the sum of its proper divisors (2472341).

11555131 is a wasteful number, since it uses less digits than its factorization.

11555131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10290 (or 10283 counting only the distinct ones).

The product of its digits is 375, while the sum is 22.

The square root of 11555131 is about 3399.2838951756. The cubic root of 11555131 is about 226.0779940690.

The spelling of 11555131 in words is "eleven million, five hundred fifty-five thousand, one hundred thirty-one".