11553131 has 4 divisors (see below), whose sum is σ = 11564592. Its totient is φ = 11541672.

The previous prime is 11553127. The next prime is 11553133. The reversal of 11553131 is 13135511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13135511 = 43 ⋅305477.

It is a cyclic number.

It is not a de Polignac number, because 11553131 - 2² = 11553127 is a prime.

It is a super-2 number, since 2×11553131² = 266949671806322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11553133) 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 3 ways as a sum of consecutive naturals, for example, 4055 + ... + 6288.

It is an arithmetic number, because the mean of its divisors is an integer number (2891148).

Almost surely, 2^11553131 is an apocalyptic number.

11553131 is a deficient number, since it is larger than the sum of its proper divisors (11461).

11553131 is a wasteful number, since it uses less digits than its factorization.

11553131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11460.

The product of its digits is 225, while the sum is 20.

The square root of 11553131 is about 3398.9897028382. The cubic root of 11553131 is about 226.0649498760.

Adding to 11553131 its reverse (13135511), we get a palindrome (24688642).

The spelling of 11553131 in words is "eleven million, five hundred fifty-three thousand, one hundred thirty-one".