13731212 has 12 divisors (see below), whose sum is σ = 26214216. Its totient is φ = 6241440.

The previous prime is 13731209. The next prime is 13731217. The reversal of 13731212 is 21213731.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (13731217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155993 + ... + 156080.

It is an arithmetic number, because the mean of its divisors is an integer number (2184518).

Almost surely, 2^13731212 is an apocalyptic number.

It is an amenable number.

13731212 is a deficient number, since it is larger than the sum of its proper divisors (12483004).

13731212 is a wasteful number, since it uses less digits than its factorization.

13731212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312088 (or 312086 counting only the distinct ones).

The product of its digits is 252, while the sum is 20.

The square root of 13731212 is about 3705.5650041525. The cubic root of 13731212 is about 239.4618265149.

Adding to 13731212 its reverse (21213731), we get a palindrome (34944943).

The spelling of 13731212 in words is "thirteen million, seven hundred thirty-one thousand, two hundred twelve".