13531812 has 24 divisors (see below), whose sum is σ = 36085056. Its totient is φ = 3866208.

The previous prime is 13531811. The next prime is 13531849. The reversal of 13531812 is 21813531.

It is not an unprimeable number, because it can be changed into a prime (13531811) 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 in 7 ways as a sum of consecutive naturals, for example, 80463 + ... + 80630.

It is an arithmetic number, because the mean of its divisors is an integer number (1503544).

Almost surely, 2^13531812 is an apocalyptic number.

13531812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13531812 is an abundant number, since it is smaller than the sum of its proper divisors (22553244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13531812 is a wasteful number, since it uses less digits than its factorization.

13531812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161107 (or 161105 counting only the distinct ones).

The product of its digits is 720, while the sum is 24.

The square root of 13531812 is about 3678.5611317470. The cubic root of 13531812 is about 238.2970421973.

The spelling of 13531812 in words is "thirteen million, five hundred thirty-one thousand, eight hundred twelve".