11512031 has 2 divisors, whose sum is σ = 11512032. Its totient is φ = 11512030.

The previous prime is 11512013. The next prime is 11512037. The reversal of 11512031 is 13021511.

Together with previous prime (11512013) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11512031 is a prime.

It is a super-2 number, since 2×11512031² = 265053715489922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 11511997 and 11512015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11512037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5756015 + 5756016.

It is an arithmetic number, because the mean of its divisors is an integer number (5756016).

Almost surely, 2^11512031 is an apocalyptic number.

11512031 is a deficient number, since it is larger than the sum of its proper divisors (1).

11512031 is an equidigital number, since it uses as much as digits as its factorization.

11512031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30, while the sum is 14.

The square root of 11512031 is about 3392.9384020344. The cubic root of 11512031 is about 225.7965577234.

Adding to 11512031 its reverse (13021511), we get a palindrome (24533542).

The spelling of 11512031 in words is "eleven million, five hundred twelve thousand, thirty-one".