131212244 has 24 divisors (see below), whose sum is σ = 234051048. Its totient is φ = 64350720.

The previous prime is 131212223. The next prime is 131212253. The reversal of 131212244 is 442212131.

It can be written as a sum of positive squares in 4 ways, for example, as 67404100 + 63808144 = 8210^2 + 7988^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56384 + ... + 58664.

It is an arithmetic number, because the mean of its divisors is an integer number (9752127).

Almost surely, 2^131212244 is an apocalyptic number.

It is an amenable number.

131212244 is a deficient number, since it is larger than the sum of its proper divisors (102838804).

131212244 is a wasteful number, since it uses less digits than its factorization.

131212244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2555 (or 2553 counting only the distinct ones).

The product of its digits is 384, while the sum is 20.

The square root of 131212244 is about 11454.7913119358. The cubic root of 131212244 is about 508.1494434980.

Adding to 131212244 its reverse (442212131), we get a palindrome (573424375).

The spelling of 131212244 in words is "one hundred thirty-one million, two hundred twelve thousand, two hundred forty-four".