131213332 has 12 divisors (see below), whose sum is σ = 229703796. Its totient is φ = 65583680.

The previous prime is 131213317. The next prime is 131213333. The reversal of 131213332 is 233312131.

It can be written as a sum of positive squares in 2 ways, for example, as 28879876 + 102333456 = 5374^2 + 10116^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131213333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17982 + ... + 24202.

It is an arithmetic number, because the mean of its divisors is an integer number (19141983).

Almost surely, 2^131213332 is an apocalyptic number.

It is an amenable number.

131213332 is a deficient number, since it is larger than the sum of its proper divisors (98490464).

131213332 is a wasteful number, since it uses less digits than its factorization.

131213332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11498 (or 11496 counting only the distinct ones).

The product of its digits is 324, while the sum is 19.

The square root of 131213332 is about 11454.8388028815. The cubic root of 131213332 is about 508.1508480038.

Adding to 131213332 its reverse (233312131), we get a palindrome (364525463).

The spelling of 131213332 in words is "one hundred thirty-one million, two hundred thirteen thousand, three hundred thirty-two".