13131945 has 24 divisors (see below), whose sum is σ = 23961600. Its totient is φ = 6634656.

The previous prime is 13131917. The next prime is 13131959. The reversal of 13131945 is 54913131.

13131945 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13131945 - 2¹⁶ = 13066409 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6825 + ... + 8534.

It is an arithmetic number, because the mean of its divisors is an integer number (998400).

Almost surely, 2^13131945 is an apocalyptic number.

13131945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13131945 is a deficient number, since it is larger than the sum of its proper divisors (10829655).

13131945 is a wasteful number, since it uses less digits than its factorization.

13131945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15389 (or 15386 counting only the distinct ones).

The product of its digits is 1620, while the sum is 27.

The square root of 13131945 is about 3623.8025608468. The cubic root of 13131945 is about 235.9262972474.

The spelling of 13131945 in words is "thirteen million, one hundred thirty-one thousand, nine hundred forty-five".