11531012 has 6 divisors (see below), whose sum is σ = 20179278. Its totient is φ = 5765504.

The previous prime is 11531011. The next prime is 11531017. The reversal of 11531012 is 21013511.

It can be written as a sum of positive squares in only one way, i.e., 10329796 + 1201216 = 3214^2 + 1096^2 .

It is not an unprimeable number, because it can be changed into a prime (11531011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1441373 + ... + 1441380.

It is an arithmetic number, because the mean of its divisors is an integer number (3363213).

Almost surely, 2^11531012 is an apocalyptic number.

It is an amenable number.

11531012 is a deficient number, since it is larger than the sum of its proper divisors (8648266).

11531012 is a wasteful number, since it uses less digits than its factorization.

11531012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2882757 (or 2882755 counting only the distinct ones).

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

The square root of 11531012 is about 3395.7343830164. The cubic root of 11531012 is about 225.9205871300.

Adding to 11531012 its reverse (21013511), we get a palindrome (32544523).

The spelling of 11531012 in words is "eleven million, five hundred thirty-one thousand, twelve".