13731081 has 48 divisors (see below), whose sum is σ = 23400576. Its totient is φ = 7008768.

The previous prime is 13731071. The next prime is 13731083. The reversal of 13731081 is 18013731.

It is not a de Polignac number, because 13731081 - 2⁶ = 13731017 is a prime.

It is a super-2 number, since 2×13731081² = 377085170857122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13731083) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 188061 + ... + 188133.

It is an arithmetic number, because the mean of its divisors is an integer number (487512).

Almost surely, 2^13731081 is an apocalyptic number.

It is an amenable number.

13731081 is a deficient number, since it is larger than the sum of its proper divisors (9669495).

13731081 is a wasteful number, since it uses less digits than its factorization.

13731081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 13731081 is about 3705.5473279935. The cubic root of 13731081 is about 239.4610649992.

The spelling of 13731081 in words is "thirteen million, seven hundred thirty-one thousand, eighty-one".