13731286 has 4 divisors (see below), whose sum is σ = 20596932. Its totient is φ = 6865642.

The previous prime is 13731259. The next prime is 13731287. The reversal of 13731286 is 68213731.

13731286 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68213731 = 397 ⋅171823.

It is a zygodrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13731287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3432820 + ... + 3432823.

It is an arithmetic number, because the mean of its divisors is an integer number (5149233).

Almost surely, 2^13731286 is an apocalyptic number.

13731286 is a deficient number, since it is larger than the sum of its proper divisors (6865646).

13731286 is an equidigital number, since it uses as much as digits as its factorization.

13731286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6865645.

The product of its digits is 6048, while the sum is 31.

The square root of 13731286 is about 3705.5749891211. The cubic root of 13731286 is about 239.4622566819.

The spelling of 13731286 in words is "thirteen million, seven hundred thirty-one thousand, two hundred eighty-six".