11995131 has 4 divisors (see below), whose sum is σ = 15993512. Its totient is φ = 7996752.

The previous prime is 11995129. The next prime is 11995147. The reversal of 11995131 is 13159911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13159911 = 3 ⋅4386637.

It is not a de Polignac number, because 11995131 - 2¹ = 11995129 is a prime.

It is a super-2 number, since 2×11995131² = 287766335414322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11995031) 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, 1999186 + ... + 1999191.

It is an arithmetic number, because the mean of its divisors is an integer number (3998378).

Almost surely, 2^11995131 is an apocalyptic number.

11995131 is a deficient number, since it is larger than the sum of its proper divisors (3998381).

11995131 is an equidigital number, since it uses as much as digits as its factorization.

11995131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3998380.

The product of its digits is 1215, while the sum is 30.

The square root of 11995131 is about 3463.3987642199. The cubic root of 11995131 is about 228.9118798015.

The spelling of 11995131 in words is "eleven million, nine hundred ninety-five thousand, one hundred thirty-one".