11315131 has 4 divisors (see below), whose sum is σ = 11427264. Its totient is φ = 11203000.

The previous prime is 11315123. The next prime is 11315137. The reversal of 11315131 is 13151311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13151311 = 101 ⋅130211.

It is a cyclic number.

It is not a de Polignac number, because 11315131 - 2³ = 11315123 is a prime.

It is a super-2 number, since 2×11315131² = 256064379094322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11315137) 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, 55915 + ... + 56116.

It is an arithmetic number, because the mean of its divisors is an integer number (2856816).

Almost surely, 2^11315131 is an apocalyptic number.

11315131 is a deficient number, since it is larger than the sum of its proper divisors (112133).

11315131 is a wasteful number, since it uses less digits than its factorization.

11315131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112132.

The product of its digits is 45, while the sum is 16.

The square root of 11315131 is about 3363.7971104096. The cubic root of 11315131 is about 224.5018179326.

Adding to 11315131 its reverse (13151311), we get a palindrome (24466442).

The spelling of 11315131 in words is "eleven million, three hundred fifteen thousand, one hundred thirty-one".